Patent US6819775B2 successfully refreshed from Google Patents.
US6819775B2
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Authentication of documents and valuable articles by using moire intensity profiles
Assignee: École Polytechnique Fédérale de Lausanne
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Filing: 2001-06-11
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Granted: 2004-11-16
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Expires: 2021-06-11
Abstract
Abstract This invention discloses new methods, security devices and apparatuses for authenticating documents and valuable articles which may be applied to any support, including transparent synthetic materials and traditional opaque materials such as paper. The invention relates to moire intensity profiles which occur in the superposition of periodic or aperiodic geometrically transformed structures. By using a specially designed basic screen and master screen, where at least the basic screen is comprised in the document, a moire intensity profile of a chosen shape becomes visible in their superposition, thereby allowing the authentication of the document. If a microlens structure is used as a master screen, the document comprising the basic screen may be printed on an opaque reflective support, thereby enabling the visualization of the moire intensity profile by reflection. Automatic document authentication is supported by an apparatus comprising a master screen, an image acquisition means such as a camera and a comparing processor whose task is to compare the acquired moire intensity profile with a reference image. Depending on the match, the document handling device connected to the comparing processor accepts or rejects the document. An important advantage of the present invention is that it can be incorporated into the standard document printing process, so that it offers high security at the same cost as standard state of the art document production.
Inventors
- 👤 Isaac Amidror
- 👤 Roger D. Hersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:58
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/128; B; B42; B42D; B42D25/00; B42D25/30; B42D25/342; G07D7/20; G07D7/202; G07D7/207
Claims Analysis
Total Claims: 88
Claim 1
Independent Claim
105 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 2
Independent Claim
105 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 3
Dependent Claim
28 words
The method of claim 1 , where the reference moire intensity profile is obtained by image acquisition of the superposition of the basic screen and the master screen.
Claim 4
Dependent Claim
16 words
The method of claim 1 , where the reference moire intensity profile is obtained by precalculation.
Claim 5
Dependent Claim
40 words
The method of claim 1 , where the reference moire intensity profile is a memorized reference moire intensity profile seen previously in a superposition of a basic screen and a master screen in documents that are known to be authentic.
Claim 6
Dependent Claim
22 words
The method of claim 1 , where comparing the moire intensity profile with a reference moire intensity profile is done by visualization.
Claim 7
Dependent Claim
37 words
The method of claim 1 , where the basic screen and the master screen are located on a transparent support, and where comparing the moire intensity profile with a reference moire intensity profile is done by visualization.
Claim 8
Dependent Claim
49 words
The method of claim 6 , where the basic screen and the master screen are located on two different areas of the same document, thereby enabling the visualization of the moire intensity profile to be performed by superposition of the basic screen and the master screen of said document.
Claim 9
Dependent Claim
44 words
The method of claim 1 , where the basic screen is created by a process for transferring an image onto a support, said process being selected from the set comprising lithographic, photolithographic, photographic, electrophotographic, engraving, etching, perforating, embossing, ink jet and dye sublimation processes.
Claim 10
Dependent Claim
44 words
The method of claim 1 , where the master screen is created by a process for transferring an image onto a support, said process being selected from the set comprising lithographic, photolithographic, photographic, electrophotographic, engraving, etching, perforating, embossing, ink jet and dye sublimation processes.
Claim 11
Dependent Claim
26 words
The method of claim 1 , where at least one screen selected from the set comprising the basic screen and the master screen contains tiny dots.
Claim 12
Dependent Claim
36 words
The method of claim 1 , where the basic screen is a multichromatic basic screen whose individual elements are colored, thereby generating a color moire image when the master screen is superposed on said basic screen.
Claim 13
Dependent Claim
35 words
The method of claim 1 , where the basic screen is a masked basic screen, thereby offering a covert means of authentication and making the re-engineering of the basic screen of the document extremely difficult.
Claim 14
Dependent Claim
38 words
The method of claim 1 , where at least one screen selected from the set comprising the basic screens and the master screen includes dots of gradually varying shapes and is incorporated within a variable intensity halftoned image.
Claim 15
Dependent Claim
16 words
The method of claim 13 , where at least one screen is a color halftoned image.
Claim 16
Dependent Claim
27 words
The method of claim 1 , where at least one screen selected from the set comprising the basic screens and the master screen is a microlens structure.
Claim 17
Dependent Claim
30 words
The method of claim 15 , where the document comprising the basic screen is printed on an opaque support, thereby allowing the moire intensity profile to be produced by reflection.
Claim 18
Dependent Claim
33 words
The method of claim 15 , where the basic screen is located on an opaque support, and where comparing the moire intensity profile with a reference moire intensity profile is done by visualization.
Claim 19
Dependent Claim
15 words
The method of claim 1 , where the aperiodic screen is a geometrically transformed screen.
Claim 20
Dependent Claim
27 words
The method of claim 1 , where the moire intensity profile produced by superposing the master screen and a basic screen is a periodic moire intensity profile.
Claim 21
Dependent Claim
43 words
The method of claim 1 , where the moire intensity profile produced by superposing the master screen and a basic screen deviates from perfect periodicity, thereby having an increased tolerance to angular and shift mismatches between the master screen and the basic screen.
Claim 22
Dependent Claim
29 words
The method of claim 1 , where at least one screen comprises varying frequencies, thereby further becoming in itself a screen trap against attempts to digitally reproduce the document.
Claim 23
Dependent Claim
56 words
The method of claim 1 , where at least one screen comprises varying frequencies, and is printed on the document using a non-standard ink color, thus making it impossible to faithfully reproduce its screen dot elements using a standard cyan, magenta, yellow and black color separation and therefore to falsify the document using standard color printing.
Claim 24
Dependent Claim
15 words
The method of claim 1 , where at least one screen is obtained by perforation.
Claim 25
Dependent Claim
15 words
The method of claim 1 , where at least one screen is obtained by etching.
Claim 26
Dependent Claim
42 words
The method of claim 1 , where comparing the moire intensity profile with a reference moire intensity profile is done by comparing at least one element of the moire intensity profile with at least one element of the reference moire intensity profile.
Claim 27
Independent Claim
104 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document. where at least one screen selected from the set comprising the basic screen and the master screen is a pinhole screen.
Claim 28
Independent Claim
104 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document. where at least one screen selected from the set comprising the basic screen and the master screen is a pinhole screen.
Claim 29
Independent Claim
105 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screen and the master screen is obtained by perforation.
Claim 30
Independent Claim
105 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screen and the master screen is obtained by perforation.
Claim 31
Independent Claim
99 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screen and the master screen is obtained by etching.
Claim 32
Independent Claim
99 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screen and the master screen is obtained by etching.
Claim 33
Independent Claim
129 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose shapes gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their shapes according to their position.
Claim 34
Independent Claim
129 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose shapes gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their shapes according to their position.
Claim 35
Independent Claim
129 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose colors gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their colors according to their position.
Claim 36
Independent Claim
129 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose colors gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their colors according to their position.
Claim 37
Independent Claim
91 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is a valuable product.
Claim 38
Independent Claim
91 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is a valuable product.
Claim 39
Independent Claim
94 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is a package of a valuable product.
Claim 40
Independent Claim
94 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is a package of a valuable product.
Claim 41
Dependent Claim
27 words
The method of claim 32 , where at least one basic screen and at least one master screen are located in different parts of the product package.
Claim 42
Independent Claim
93 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is affixed to a valuable product.
Claim 43
Independent Claim
93 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where the document is affixed to a valuable product.
Claim 44
Dependent Claim
33 words
The method of claim 34 , where at least one basic screen and at least one master screen are located in different parts of the document that is affixed to the valuable product.
Claim 45
Independent Claim
126 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen is located on a valuable product, and where at least one other screen selected from the same set is located on the valuable product's package.
Claim 46
Independent Claim
126 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile; and c) comparing said moire intensity profile with a reference moire intensity profile and depending on the result of the comparison, accepting or rejecting the document, where at least one screen selected from the set comprising the basic screens and the master screen is located on a valuable product, and where at least one other screen selected from the same set is located on the valuable product's package.
Claim 47
Independent Claim
90 words
An apparatus for authentication of documents making use of at least one moire intensity profile, the apparatus comprising: a) a master screen; b) an image acquisition means arranged to acquire a moire intensity profile produced by the superposition of a basic screen located on a document and the master screen; and c) a comparing means operable for comparing the acquired moire intensity profile with a reference moire intensity profile, where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 48
Independent Claim
90 words
An apparatus for authentication of documents making use of at least one moire intensity profile, the apparatus comprising: a) a master screen; b) an image acquisition means arranged to acquire a moire intensity profile produced by the superposition of a basic screen located on a document and the master screen; and c) a comparing means operable for comparing the acquired moire intensity profile with a reference moire intensity profile, where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 49
Dependent Claim
15 words
The apparatus of claim 37 , where the aperiodic screen is a geometrically transformed screen.
Claim 50
Dependent Claim
23 words
The apparatus of claim 37 , where the image acquisition means and comparing means are human biosystems, a human eye and brain respectively.
Claim 51
Dependent Claim
36 words
The apparatus of claim 37 , where the comparing means is a comparing processor controlling a document handling device accepting, respectively rejecting a document to be authenticated, according to the comparison operated by the comparing processor.
Claim 52
Dependent Claim
33 words
The apparatus of claim 40 , where the comparing processor is a microcomputer comprising a processor, memory and input-output ports and where the image acquisition means is a camera connected to said microcomputer.
Claim 53
Dependent Claim
13 words
The apparatus of claim 37 where the master screen is a microlens structure.
Claim 54
Independent Claim
87 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; and b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile which is apparent to a human eye; where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 55
Independent Claim
87 words
A method for authenticating documents by using at least one moire intensity profile, the method comprising the steps of: a) creating on a document at least one basic screen with at least one basic screen dot shape; and b) superposing a master screen with a master screen dot shape and the basic screen, thereby producing a moire intensity profile which is apparent to a human eye; where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 56
Dependent Claim
15 words
The method of claim 43 , where the aperiodic screen is a geometrically transformed screen.
Claim 57
Dependent Claim
27 words
The method of claim 43 , where at least one screen selected from the set comprising the basic screens and the master screen is obtained by perforation.
Claim 58
Dependent Claim
27 words
The method of claim 43 , where at least one screen selected from the set comprising the basic screens and the master screen is obtained by etching.
Claim 59
Dependent Claim
27 words
The method of claim 43 , where at least one screen selected from the set comprising the basic screens and the master screen is a microlens structure.
Claim 60
Dependent Claim
116 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the basic screen is a multichromatic basic screen whose individual elements are colored, thereby generating a color moire image when the master screen is superposed on said basic screen.
Claim 61
Dependent Claim
116 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the basic screen is a multichromatic basic screen whose individual elements are colored, thereby generating a color moire image when the master screen is superposed on said basic screen.
Claim 62
Dependent Claim
131 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose shapes gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their shapes according to their position.
Claim 63
Dependent Claim
131 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose shapes gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their shapes according to their position.
Claim 64
Dependent Claim
131 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose colors gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their colors according to their position.
Claim 65
Dependent Claim
131 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots whose colors gradually vary according to their position, thereby generating in the screen superposition moire intensity profiles which vary in their colors according to their position.
Claim 66
Dependent Claim
118 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots of gradually varying shapes and is incorporated within a variable intensity halftoned image.
Claim 67
Dependent Claim
118 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen includes dots of gradually varying shapes and is incorporated within a variable intensity halftoned image.
Claim 68
Dependent Claim
17 words
The security device of claim 51 , where at least one screen is a color halftoned image.
Claim 69
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 70
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is an aperiodic screen.
Claim 71
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is obtained by perforation.
Claim 72
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is obtained by perforation.
Claim 73
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is obtained by etching.
Claim 74
Dependent Claim
107 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is obtained by etching.
Claim 75
Dependent Claim
93 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is a valuable product.
Claim 76
Dependent Claim
93 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is a valuable product.
Claim 77
Dependent Claim
96 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is a package of a valuable product.
Claim 78
Dependent Claim
96 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is a package of a valuable product.
Claim 79
Dependent Claim
95 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is affixed to a valuable product.
Claim 80
Dependent Claim
95 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the document is affixed to a valuable product.
Claim 81
Dependent Claim
128 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is located on a valuable product, and where at least one other screen selected from the same set is located on the valuable product's package.
Claim 82
Dependent Claim
128 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where at least one screen selected from the set comprising the basic screens and the master screen is located on a valuable product, and where at least one other screen selected from the same set is located on the valuable product's package.
Claim 83
Dependent Claim
97 words
A security document protected by a security device, said security device comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, where said security document is an optical disk.
Claim 84
Dependent Claim
97 words
A security document protected by a security device, said security device comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, where said security document is an optical disk.
Claim 85
Dependent Claim
100 words
A security document protected by a security device, said security device comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the refection of the document depending on the result of the comparison, where said security document is a package of a valuable product.
Claim 86
Dependent Claim
100 words
A security document protected by a security device, said security device comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the refection of the document depending on the result of the comparison, where said security document is a package of a valuable product.
Claim 87
Dependent Claim
115 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the basic screen is created by an embossing process and the master screen is selected from the set comprising pinhole screens, screens containing tiny dots and microlens structures.
Claim 88
Dependent Claim
115 words
A security device for authentication of documents comprising at least one basic screen with at least one basic screen dot shape, that is located on the document, where the document authentication is done by superposing a master screen with a master screen dot shape and a basic screen, thereby producing a moire intensity profile and permitting the comparison of said moire intensity profile with a reference moire intensity profile and the acceptance or the rejection of the document depending on the result of the comparison, and where the basic screen is created by an embossing process and the master screen is selected from the set comprising pinhole screens, screens containing tiny dots and microlens structures.
References Cited (Backward Citations)
GB1138011A
Cited
GB2224240A
Cited
US5018767A
Cited
US5275870A
Cited
US5396559A
Cited
US5712731A
Cited
US6198545B1
Cited
US5995638A
Cited
US6249588B1
Cited
US6390377B1
Cited
US20040001604A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-11-16 | 2008-05-17 | 2008-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-16 | 2012-05-17 | 2012-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-16 | 2016-05-17 | 2016-11-16 | $7700.00 | Window Closed / Lapsed |