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EP0130953A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of securing simple codes

Assignee: Esselte Security Systems AB
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Filing: 1984-06-20
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Granted: —
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Expires: 2004-06-20
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Abstract

Abstract The invention relates to a method of securing simple codes (5), which are built up of a plurality of lines symbols or patterns, which are readable by a machine, and which codes (5) are intended to be located on documents (2), valuable documents or marked units.The invention is characterized in that at the generating or writing-down of the codes (5) one or more of said lines, symbols or patterns constituting the code (5) each are caused to transform to a line (11) or an area, which does not constitute a part of the code (5), but constitutes a part of the pattern, in order to render a falsification by altering the code after its writing-down substancially more difficult.According to a preferred embodiment the invention further is characterized in that a so-called line code (5) is generated, and at its generation or writing-down one or several of the lines associated with the code are caused to continuously or intermittently transform to a line (11) deviating from the line associated with the code.

Inventors

  • 👤 Eric Rothfjell

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 16:05
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/086; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K19/08; G06K19/10; Y; Y10; Y10S; Y10S283/00; Y10S283/904

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 107 words
A method of securing simple codes, which are built--up of a plurality of lines, symbols or patterns, which are readable by a machine, and which codes are intended to be located on documents, valuable documents or marked units, characterized i n that at the generating or writing-down of the codes one or several of said lines, symbols or patterns constituting the code each are caused to transform to a line or an area, which do not constitute a part of the code, but which constitute a part of a pattern, in order to render a falsification by altering the code after its ' writing-down substantially more difficult.
Claim 2
Independent Claim 107 words
A method of securing simple codes, which are built--up of a plurality of lines, symbols or patterns, which are readable by a machine, and which codes are intended to be located on documents, valuable documents or marked units, characterized i n that at the generating or writing-down of the codes one or several of said lines, symbols or patterns constituting the code each are caused to transform to a line or an area, which do not constitute a part of the code, but which constitute a part of a pattern, in order to render a falsification by altering the code after its ' writing-down substantially more difficult.
Claim 3
Dependent Claim 46 words
A method as defined in claim 1, characterized in that two or more of said lines or areas, which do not constitute a code, together are caused to form a pattern over a portion of the document or the like, on which the code is applied.
Claim 4
Dependent Claim 25 words
A method as defined in claim 2, characterized in that said pattern in its entirety is generated outside the area taken up by the code.
Claim 5
Dependent Claim 52 words
A method as defined in claim 1,2 or 3, characterized in that a so-called line code is generated and at its generating or writing-down one or several of the lines associated with the code are caused to continuously or intermittently transform to a line deviating from the line associated with the code.
Claim 6
Dependent Claim 31 words
A method as defined in claim 4, characterized in that said lines are caused to form an angle to the lines associated with the code and/or are caused to be non-linear.
Claim 7
Dependent Claim 24 words
A method as defined in claim 4 or 5, characterized in that said lines are caused to describe wave patterns or other non-linear patterns.
Claim 8
Dependent Claim 30 words
A method as defined in claim 1,2 or 6, characterized in that said pattern, which does not constitute a code, consists of a safety pattern, preferably of a so-called guilloche.

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