Patent US2168779A successfully refreshed from Google Patents.
Patent US5546462A successfully refreshed from Google Patents.
US5546462A
Expired / Lapsed
US
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Method and apparatus for fingerprinting and authenticating various magnetic media
Assignee: Washington University in St. Louis
•
Filing: 1994-09-09
•
Granted: 1996-08-13
•
Expires: 2014-09-09
Abstract
Abstract A method and apparatus is disclosed for determining the remanent noise in a magnetic medium by, for example, DC saturation of a region thereof and measurement of the remaining DC magnetization. A conventional magnetic recording transducer may be used to determine the remanent noise. Upon determination, the remanent noise may then be digitized and recorded on the same magnetic medium to thereby "fingerprint" the magnetic medium. This "fingerprint" may then be later used to verify and authenticate the magnetic medium as being an original. The magnetic medium may be of a type adapted to record information magnetically or, even more broadly, any magnetic surface or substance that can be sensed through its magnetic field. In such manner, any magnetic medium, or any object having an associated magnetic medium, may be "fingerprinted" including credit cards, computer program diskettes, magneto-optic discs, videotapes, cassette tapes, bank checks, stock certificates, etc.
Inventors
- 👤 Ronald S. Indeck
- 👤 Marcel W. Muller
- 👤 George Lawrence Engel
- 👤 Alan L. Hege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:57
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/28; G11B23/283; G06; G06F; G06F21/00; G06F21/10; G06F21/101; G06F21/16; G06F21/70; G06F21/78; G06F21/79; G06K; G06K1/00; G06K1/12; G06K1/125; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/12; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/347; G06Q20/36; G06Q20/367; G06Q20/3674; G07; G07D; G07D7/00; G07D7/004; G07D7/04; G07F; G07F7/00; G07F7/08; G07F7/0806; G07F7/0813; G07F7/086; G07F7/12; G07F7/125; G11B20/00; G11B20/00086; G11B20/00094; G11B20/00123; G11B5/00; G06F2211/00; G06F2211/007; G11B23/281; G11B23/284
Claims Analysis
Total Claims: 144
Claim 1
Independent Claim
72 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 2
Independent Claim
72 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 3
Dependent Claim
18 words
The device of claim 1 wherein said recording means has means for recording said fingerprint on said object.
Claim 4
Dependent Claim
26 words
The device of claim 2 wherein said recording means includes means for embodying said remanent noise in said non-recording magnetic medium portion in machine readable form.
Claim 5
Dependent Claim
22 words
The device of claim 3 further comprising means for encrypting said remanent noise prior to its being recorded by said recording means.
Claim 6
Dependent Claim
12 words
The device of claim 4 wherein said object is a financial instrument.
Claim 7
Dependent Claim
24 words
The device of claim 5 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 8
Dependent Claim
13 words
The device of claim 6 wherein said financial instrument is a bank check.
Claim 9
Dependent Claim
16 words
The device of claim 7 wherein said remanent noise is encrypted with a trap door function.
Claim 10
Dependent Claim
18 words
The device of claim 2 wherein said non-recording magnetic medium portion comprises a label affixed to said object.
Claim 11
Dependent Claim
33 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said finger-print comprising a remanent noise for said non-recording magnetic medium portion.
Claim 12
Dependent Claim
33 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said finger-print comprising a remanent noise for said non-recording magnetic medium portion.
Claim 13
Dependent Claim
13 words
The object of claim 10 wherein said fingerprint is recorded on said object.
Claim 14
Dependent Claim
21 words
The object of claim 11 wherein said remanent noise is recorded in said non-recording magnetic medium portion in machine readable form.
Claim 15
Dependent Claim
19 words
The object of claim 12 wherein said remanent noise is encrypted prior to its being recorded on said object.
Claim 16
Dependent Claim
12 words
The object of claim 13 wherein said object is a financial instrument.
Claim 17
Dependent Claim
24 words
The object of claim 14 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 18
Dependent Claim
13 words
The object of claim 15 wherein said financial instrument is a bank check.
Claim 19
Dependent Claim
17 words
The object of claim 10 wherein said magnetic medium portion comprises a label affixed to said object.
Claim 20
Dependent Claim
38 words
The device of claim 1 wherein said determining means includes means for DC saturating a region of said non-recording magnetic medium and means for reading a residual voltage over said region, said residual voltage comprising said remanent noise.
Claim 21
Dependent Claim
21 words
The device of claim 18 wherein said region comprises a linear portion extending between about 30 micrometers and about 4300 micrometers.
Claim 22
Dependent Claim
25 words
The device of claim 18 wherein said determining means further comprises means for averaging a plurality of residual voltage readings, said average comprising said fingerprint.
Claim 23
Dependent Claim
15 words
The device of claim 1 wherein said determining means comprises a conventional magnetic recording head.
Claim 24
Independent Claim
84 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said recorded fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 25
Independent Claim
84 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said recorded fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 26
Dependent Claim
13 words
The device of claim 22 wherein said object has its fingerprint recorded thereon.
Claim 27
Dependent Claim
20 words
The device of claim 22 wherein said fingerprint is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 28
Dependent Claim
20 words
The device of claim 24 wherein said fingerprint is encrypted, and said translation means includes means for de-crypting said fingerprint.
Claim 29
Dependent Claim
12 words
The device of claim 25 wherein said object is a financial instrument.
Claim 30
Dependent Claim
24 words
The device of claim 26 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 31
Dependent Claim
13 words
The device of claim 27 wherein said financial instrument is a bank check.
Claim 32
Dependent Claim
16 words
The device of claim 25 wherein said remanent noise is encrypted with a trap door function.
Claim 33
Dependent Claim
18 words
The device of claim 22 wherein said non-recording magnetic medium portion comprises a label affixed to said object.
Claim 34
Independent Claim
67 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording magnetic medium portion, reading said fingerprint, and comparing said determined remanent noise with said fingerprint.
Claim 35
Independent Claim
67 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording magnetic medium portion, reading said fingerprint, and comparing said determined remanent noise with said fingerprint.
Claim 36
Dependent Claim
34 words
The method of claim 31 wherein said fingerprint comprises a machine readable representation of said previously determined remanent noise, and the step of reading includes the step of reading said fingerprint with a machine.
Claim 37
Dependent Claim
27 words
The method of claim 32 wherein said fingerprint comprises an encrypted representation of said previously determined remanent noise, and further comprising the step of de-crypting said fingerprint.
Claim 38
Independent Claim
67 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 39
Independent Claim
67 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 40
Dependent Claim
16 words
The method of claim 34 further comprising the step of encrypting said fingerprint prior to recording.
Claim 41
Independent Claim
84 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 42
Independent Claim
84 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 43
Dependent Claim
18 words
The device of claim 36 wherein said recording means has means for recording said fingerprint on said object.
Claim 44
Dependent Claim
26 words
The device of claim 37 Wherein said recording means includes means for embodying said remanent noise in said non-recording magnetic medium portion in machine readable form.
Claim 45
Dependent Claim
22 words
The device of claim 38 further comprising means for encrypting said remanent noise prior to its being recorded by said recording means.
Claim 46
Dependent Claim
12 words
The device of claim 39 wherein said object is a financial instrument.
Claim 47
Dependent Claim
24 words
The device of claim 40 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 48
Independent Claim
76 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise from a magnetic micro-structure for said nonrecording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 49
Independent Claim
76 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a non-recording magnetic medium portion, said device having means for determining a remanent noise from a magnetic micro-structure for said nonrecording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 50
Dependent Claim
18 words
The device of claim 42 wherein said recording means has means for recording said fingerprint on said object.
Claim 51
Dependent Claim
26 words
The device of claim 43 wherein said recording means includes means for embodying said remanent noise in said non-recording magnetic medium portion in machine readable form.
Claim 52
Dependent Claim
22 words
The device of claim 44 further comprising means for encrypting said remanent noise prior to its being recorded by said recording means.
Claim 53
Dependent Claim
12 words
The device of claim 42 wherein said object is a financial instrument.
Claim 54
Dependent Claim
24 words
The device of claim 46 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 55
Independent Claim
74 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a uniformly manufactured non-recording magnetic medium portion, said device having means for determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 56
Independent Claim
74 words
A device for fingerprinting an object for the later determination of its identity, said object including at least in part, a uniformly manufactured non-recording magnetic medium portion, said device having means for determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising the fingerprint for said object, and means for recording said remanent noise for later comparison with the later determination of said remanent noise to thereby identify said object.
Claim 57
Dependent Claim
18 words
The device of claim 48 wherein said recording means has means for recording said fingerprint on said object.
Claim 58
Dependent Claim
26 words
The device of claim 49 wherein said recording means includes means for embodying said remanent noise in said non-recording magnetic medium portion in machine readable form.
Claim 59
Dependent Claim
12 words
The device of claim 48 wherein said object is a financial instrument.
Claim 60
Dependent Claim
24 words
The device of claim 51 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 61
Dependent Claim
42 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for no more than about several hundreds of micrometers of said non-recording magnetic medium portion.
Claim 62
Dependent Claim
42 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for no more than about several hundreds of micrometers of said non-recording magnetic medium portion.
Claim 63
Dependent Claim
13 words
The object of claim 53 wherein said fingerprint is recorded on said object.
Claim 64
Dependent Claim
21 words
The object of claim 54 wherein said remanent noise is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 65
Dependent Claim
19 words
The object of claim 55 wherein said remanent noise is encrypted prior to its being recorded on said object.
Claim 66
Dependent Claim
12 words
The device of claim 53 wherein said object is a financial instrument.
Claim 67
Dependent Claim
24 words
The device of claim 57 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 68
Dependent Claim
37 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise from a magnetic microstructure for said non-recording magnetic medium portion.
Claim 69
Dependent Claim
37 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise from a magnetic microstructure for said non-recording magnetic medium portion.
Claim 70
Dependent Claim
13 words
The object of claim 59 wherein said fingerprint is recorded on said object.
Claim 71
Dependent Claim
21 words
The object of claim 60 wherein said remanent noise is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 72
Dependent Claim
19 words
The object of claim 61 wherein said remanent noise is encrypted prior to its being recorded on said object.
Claim 73
Dependent Claim
12 words
The device of claim 59 wherein said object is a financial instrument.
Claim 74
Dependent Claim
24 words
The device of claim 63 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 75
Dependent Claim
35 words
An object having its fingerprint recorded for the later verification of its identity, said object having a uniformly manufactured non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion.
Claim 76
Dependent Claim
35 words
An object having its fingerprint recorded for the later verification of its identity, said object having a uniformly manufactured non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion.
Claim 77
Dependent Claim
13 words
The object of claim 65 wherein said fingerprint is recorded on said object.
Claim 78
Dependent Claim
21 words
The object of claim 66 wherein said remanent noise is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 79
Dependent Claim
19 words
The object of claim 67 wherein said remanent noise is encrypted prior to its being recorded on said object.
Claim 80
Dependent Claim
12 words
The device of claim 65 wherein said object is a financial instrument.
Claim 81
Dependent Claim
24 words
The device of claim 69 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 82
Independent Claim
95 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 83
Independent Claim
95 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 84
Dependent Claim
13 words
The device of claim 71 wherein said object has its fingerprint recorded thereon.
Claim 85
Dependent Claim
20 words
The device of claim 72 wherein said fingerprint is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 86
Dependent Claim
20 words
The device of claim 73 wherein said fingerprint is encrypted, and said translation means includes means for de-crypting said fingerprint.
Claim 87
Dependent Claim
12 words
The device of claim 71 wherein said object is a financial instrument.
Claim 88
Dependent Claim
24 words
The device of claim 75 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 89
Independent Claim
87 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 90
Independent Claim
87 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 91
Dependent Claim
13 words
The device of claim 77 wherein said object has its fingerprint recorded thereon.
Claim 92
Dependent Claim
20 words
The device of claim 77 wherein said fingerprint is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 93
Dependent Claim
20 words
The device of claim 79 wherein said fingerprint is encrypted, and said translation means includes means for de-crypting said fingerprint.
Claim 94
Dependent Claim
12 words
The device of claim 77 wherein said object is a financial instrument.
Claim 95
Dependent Claim
24 words
The device of claim 81 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 96
Independent Claim
85 words
A device for authenticating an object having a fingerprint recorded, said object having a uniformly manufactured non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said nonrecording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 97
Independent Claim
85 words
A device for authenticating an object having a fingerprint recorded, said object having a uniformly manufactured non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said nonrecording magnetic medium portion, said device including means for reading said recorded fingerprint, means for translating said remanent noise from said fingerprint, means for determining a remanent noise directly from said non-recording magnetic medium portion, and means for comparing said translated remanent noise with said determined remanent noise to determine whether they match, thereby authenticating said object.
Claim 98
Dependent Claim
13 words
The device of claim 83 wherein said object has its fingerprint recorded thereon.
Claim 99
Dependent Claim
20 words
The device of claim 83 wherein said fingerprint is embodied in said non-recording magnetic medium portion in machine readable form.
Claim 100
Dependent Claim
20 words
The device of claim 85 wherein said fingerprint is encrypted, and said translation means includes means for de-crypting said fingerprint.
Claim 101
Dependent Claim
12 words
The device of claim 83 wherein said object is a financial instrument.
Claim 102
Dependent Claim
24 words
The device of claim 87 wherein said non-recording magnetic medium portion comprises at least a portion of a character applied to said financial instrument.
Claim 103
Independent Claim
87 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 104
Independent Claim
87 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 105
Dependent Claim
34 words
The method of claim 89 wherein said fingerprint comprises a machine readable representation of said previously determined remanent noise, and the step of reading includes the step of reading said fingerprint with a machine.
Claim 106
Dependent Claim
27 words
The method of claim 90 wherein said fingerprint comprises an encrypted representation of said previously determined remanent noise, and further comprising the step of de-crypting said fingerprint.
Claim 107
Independent Claim
79 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 108
Independent Claim
79 words
A method for authenticating an object, said object including at least in part a non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 109
Dependent Claim
34 words
The method of claim 92 wherein said fingerprint comprises a machine readable representation of said previously determined remanent noise, and the step of reading includes the step of reading said fingerprint with a machine.
Claim 110
Dependent Claim
27 words
The method of claim 93 wherein said fingerprint comprises an encrypted representation of said previously determined remanent noise, and further comprising the step of de-crypting said fingerprint.
Claim 111
Independent Claim
78 words
A method for authenticating an object, said object including at least in part a uniformly manufactured non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for said nonrecording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording magnetic medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 112
Independent Claim
78 words
A method for authenticating an object, said object including at least in part a uniformly manufactured non-recording magnetic medium portion, said object having a fingerprint recorded, said fingerprint comprising a previously determined remanent noise for said nonrecording magnetic medium portion, said method comprising the steps of: determining a remanent noise directly from said non-recording magnetic medium portion, reading said fingerprint, and correlating said determined remanent noise with said fingerprint, said correlation thereby indicating if said object is authentic.
Claim 113
Dependent Claim
34 words
The method of claim 95 wherein said fingerprint comprises a machine readable representation of said previously determined remanent noise, and the step of reading includes the step of reading said fingerprint with a machine.
Claim 114
Dependent Claim
27 words
The method of claim 96 wherein said fingerprint comprises an encrypted representation of said previously determined remanent noise, and further comprising the step of de-crypting said fingerprint.
Claim 115
Independent Claim
79 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 116
Independent Claim
79 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for a length of no more than about several hundreds of micrometers of said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 117
Dependent Claim
16 words
The method of claim 98 further comprising the step of encrypting said fingerprint prior to recording.
Claim 118
Independent Claim
71 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 119
Independent Claim
71 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise from a magnetic micro-structure for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 120
Dependent Claim
16 words
The method of claim 100 further comprising the step of encrypting said fingerprint prior to recording.
Claim 121
Independent Claim
69 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a uniformly manufactured non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 122
Independent Claim
69 words
A method for fingerprinting an object for the later determination of its identity, said object including at least in part a uniformly manufactured non-recording magnetic medium portion, said method comprising the steps of determining a remanent noise for said non-recording magnetic medium portion, said remanent noise comprising said fingerprint, and recording said fingerprint on said object for the later comparison thereof with the later determination of said remanent noise.
Claim 123
Dependent Claim
16 words
The method of claim 102 further comprising the step of encrypting said fingerprint prior to recording.
Claim 124
Independent Claim
93 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said recorded fingerprint comprising a signal corresponding to a first read of a remanent noise in said non-recording magnetic medium portion, means for determining said fingerprint by a second read of said remanent noise in said non-recording magnetic medium portion, and means for comparing said recorded fingerprint with said determined fingerprint including means for compensating for differences between said first read and said second read to determine whether said fingerprints match, thereby authenticating said object.
Claim 125
Independent Claim
93 words
A device for authenticating an object having a fingerprint recorded, said object having a non-recording magnetic medium portion, said recorded fingerprint comprising a signal corresponding to a first read of a remanent noise in said non-recording magnetic medium portion, means for determining said fingerprint by a second read of said remanent noise in said non-recording magnetic medium portion, and means for comparing said recorded fingerprint with said determined fingerprint including means for compensating for differences between said first read and said second read to determine whether said fingerprints match, thereby authenticating said object.
Claim 126
Dependent Claim
31 words
The device of claim 104 wherein said compensating means includes means for compensating for differences between a speed at which each of said first read and said second read is performed.
Claim 127
Dependent Claim
24 words
The device of claim 105 wherein said speed compensation means includes means for adjusting a sampling rate at which said second read is performed.
Claim 128
Dependent Claim
29 words
The device of claim 106 wherein said adjusting means includes means for measuring the speed of said second read and comparing it with the speed of said first read.
Claim 129
Dependent Claim
23 words
The device of claim 105 wherein said speed compensation means includes means for oversampling said remanent noise during at least said second read.
Claim 130
Dependent Claim
19 words
The device of claim 108 wherein said speed compensation means includes means for adjusting a rate of said oversampling.
Claim 131
Dependent Claim
50 words
The device of claim 105 wherein each of said recorded and determined fingerprints comprises a digital sample of said remanent noise, and wherein said speed compensation means includes means for creating for said second read a digital sample approximately 100 times larger than the digital sample of said first read.
Claim 132
Independent Claim
93 words
A method for authenticating an object, said object-including at least in part a non-recording magnetic medium portion having a fingerprint, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion previously determined by a first read thereof, said method comprising the steps of: determining a remanent noise directly from said magnetic medium portion by a second read thereof, comparing said determined remanent noise with said previously determined remanent noise, and compensating for differences between said first read and said second read to determine whether said fingerprints match, thereby authenticating said object.
Claim 133
Independent Claim
93 words
A method for authenticating an object, said object-including at least in part a non-recording magnetic medium portion having a fingerprint, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion previously determined by a first read thereof, said method comprising the steps of: determining a remanent noise directly from said magnetic medium portion by a second read thereof, comparing said determined remanent noise with said previously determined remanent noise, and compensating for differences between said first read and said second read to determine whether said fingerprints match, thereby authenticating said object.
Claim 134
Dependent Claim
34 words
The method of claim 111 wherein the step of compensating further includes the step of compensating for differences between a speed at which each of said first read and said second read is performed.
Claim 135
Dependent Claim
27 words
The method of claim 112 wherein the step of speed compensating further includes the step of adjusting a sampling rate at which said second read is performed.
Claim 136
Dependent Claim
31 words
The method of claim 113 wherein the step of adjusting includes the steps of measuring the speed of said second read and comparing it with the speed of said first read.
Claim 137
Dependent Claim
26 words
The method of claim 112 wherein the step of speed compensating further includes the step of oversampling said remanent noise during at least said second read.
Claim 138
Dependent Claim
21 words
The method of claim 115 wherein the step of speed compensating further includes the step of adjusting a rate of oversampling.
Claim 139
Dependent Claim
58 words
The method of claim 112 wherein each of said previously determined remanent noise and said determined remanent noise comprises a digital sample of said remanent noise, and wherein the step of speed compensating further comprises the step of creating for said second read a digital sample approximately 100 times larger than the digital sample of said first read.
Claim 140
Dependent Claim
78 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion determined by a first read of said non-recording magnetic medium portion, and a speed of said read being recorded in association with said fingerprint for later use in compensating for differences between a speed of a subsequent read and the speed of said first read.
Claim 141
Dependent Claim
78 words
An object having its fingerprint recorded for the later verification of its identity, said object having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said non-recording magnetic medium portion determined by a first read of said non-recording magnetic medium portion, and a speed of said read being recorded in association with said fingerprint for later use in compensating for differences between a speed of a subsequent read and the speed of said first read.
Claim 142
Dependent Claim
35 words
The object of claim 118 further comprising a plurality of spaced timing marks on said non-recording magnetic medium portion so that a speed of said non-recording magnetic medium portion may be determined during a read.
Claim 143
Dependent Claim
59 words
A security card with a fingerprint for limiting access to a controlled access environment, said security card having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said nonrecording magnetic medium portion, said security card being validated to permit access only upon a match of a subsequent determination of said fingerprint with a previously determined fingerprint.
Claim 144
Dependent Claim
59 words
A security card with a fingerprint for limiting access to a controlled access environment, said security card having a non-recording magnetic medium portion, said fingerprint comprising a remanent noise for said nonrecording magnetic medium portion, said security card being validated to permit access only upon a match of a subsequent determination of said fingerprint with a previously determined fingerprint.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |