Patent US3790754A successfully refreshed from Google Patents.
US3790754A
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US
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Security access medium
Assignee: Unisys Ltd
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Filing: 1972-08-04
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Granted: 1974-02-05
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Expires: 1992-08-04
Abstract
Abstract Disclosed is a security access medium and a security system utilizing the medium which is adapted to prevent fraudulent reproduction of the medium bearing member. Within the system the data representation has a predetermined relationship with a signature ''''developed'''' from the medium. When the medium is not in the system the signature is latent and not dectaotable. A plurality of substances capable of bearing records are incorporated in the medium, as a plurality of paramagnetic materials having different coercivity, to permit ''''development'''' of a secure signature.
Inventors
- 👤 C Rainey
- 👤 R Black
- 👤 D Provan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:22
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/12; G07; G07F; G07F7/00; G07F7/08; G07F7/086
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
80 words
A credit card having a magnetic data track, detectable means separate from said magnetic data track for generating a value peculiar to the peculiar credit card bearing said detectable means for providing a measurable secure property different from other similar cards to enable determination of the validity of the card and of the validity of information recorded on the magnetic data track, said detectable means comprising a plurality of magnetic areas, at least some of which have different magnetic properties.
Claim 2
Dependent Claim
80 words
A credit card having a magnetic data track, detectable means separate from said magnetic data track for generating a value peculiar to the peculiar credit card bearing said detectable means for providing a measurable secure property different from other similar cards to enable determination of the validity of the card and of the validity of information recorded on the magnetic data track, said detectable means comprising a plurality of magnetic areas, at least some of which have different magnetic properties.
Claim 3
Dependent Claim
19 words
A credit card according to claim 1 wherein said magnetic areas are spaced from one another a variable distance.
Claim 4
Dependent Claim
30 words
A credit card according to claim 2 wherein one or more of the spaced magnetic areas of similar magnetic properties overlap and/or adjoin spaced magnetic areas having different magnetic properties.
Claim 5
Dependent Claim
39 words
A credit card according to claim 4 wherein a first area is applied to said substrate in a first printing pass along a predetermined track and a second areas is applied to said substrate in a second printing pass.
Claim 6
Dependent Claim
18 words
A credit card according to claim 2 wherein said areas are formed as bars aligned in a track.
Claim 7
Dependent Claim
33 words
A credit card according to claim 5 wherein said track represents a direction of reading said magnetic bars and said bars are inclined at an angle with respect to said direction of reading.
Claim 8
Dependent Claim
16 words
A credit card according to claim 2 wherein said spacing varies randomly due to printing variances.
Claim 9
Dependent Claim
37 words
A credit card according to claim 1 wherein said magnetic areas are formed as bars aligned in a track, at least some of said bars of one different coercivity being interspersed between bars of another different coercivity.
Claim 10
Dependent Claim
25 words
A credit card according to claim 8 wherein the measurement of values is a function of the magnetic properties of magnetic ink of said bars.
Claim 11
Dependent Claim
39 words
A credit card according to claim 9 wherein said measurement of values is a function of both the magnetic properties of the magnetic inks of said bars and of the relative spacing of said bars along a reading track.
Claim 12
Dependent Claim
52 words
A credit card according to claim 8 wherein the value determined by measurement of magnetic properties includes a value dependent upon a difference determined by a measurement of the spacing of a plurality of magnetic bars of a first magnetic ink and a spacing of a plurality of a second magnetic ink.
Claim 13
Dependent Claim
22 words
A credit card according to claim 1 wherein the value peculiar to the particular credit card is recorded on the credit card.
Claim 14
Dependent Claim
23 words
A credit card according to claim 12 wherein the value gEnerated is recorded on the credit card after it is encrypted and/or encoded.
Claim 15
Dependent Claim
27 words
A credit card according to claim 13 wherein the encrypted and/or encoded value is such that the information recorded on the magnetic track is a random value.
Claim 16
Dependent Claim
26 words
A credit card according to claim 1 wherein said magnetic areas have a random amount of magnetic material due to variances in printing of the areas.
Claim 17
Dependent Claim
17 words
A credit card according to claim 1 wherein the areas are magnetic substances of a different coercivity.
Claim 18
Dependent Claim
43 words
A credit card according to claim 16 wherein the magnetic substances have a readable value when in the latent state of a first level and this readable value is raised to a second level when the substance read is in an active state.
Claim 19
Dependent Claim
20 words
A credit card according to claim 17 wherein the value of the areas is a function of said different coercivities.
Claim 20
Dependent Claim
122 words
A security access medium comprising a substrate, a secure substance for said substrate, said secure substance having a first part and a second part, said first and second part having a latent and an active state, said active state having for each part a standard measurable value, the standard measurable value of each part of the medium having a measurable relationship to predetermined limits for each part and to the value of the other part, said first part and said second part being applied to said substrate such that the standard measurable value of the active state may not be predetermined as a specific standard measurable value before activation but is measured after activation when each part is in its active state.
Claim 21
Dependent Claim
122 words
A security access medium comprising a substrate, a secure substance for said substrate, said secure substance having a first part and a second part, said first and second part having a latent and an active state, said active state having for each part a standard measurable value, the standard measurable value of each part of the medium having a measurable relationship to predetermined limits for each part and to the value of the other part, said first part and said second part being applied to said substrate such that the standard measurable value of the active state may not be predetermined as a specific standard measurable value before activation but is measured after activation when each part is in its active state.
Claim 22
Dependent Claim
23 words
A security access medium according to claim 19 wherein the medium employs magnetic substances in which each part is of a different coercivity.
Claim 23
Dependent Claim
44 words
A security access medium according to claim 20 wherein the magnetic substances have a readable value when in the latent state of a first level and this readable value is raised to a second level when the substance read is in its active state.
Claim 24
Dependent Claim
24 words
A security access medium according to claim 21 wherein the standard measurable value of the active state is a function of said different coercivities.
Claim 25
Dependent Claim
40 words
A security access medium according to claim 19 wherein said first part is applied to said substrate in a first printing pass along a predetermined track and said second part is applied to said substrate in a second printing pass.
Claim 26
Dependent Claim
25 words
A security access medium according to claim 23 wherein said first part and said second part are a plurality of bars printed on the medium.
Claim 27
Dependent Claim
24 words
Security access medium according to claim 24 wherein said bars having an inclination with respect to said printed track between one and ten degrees.
Claim 28
Dependent Claim
34 words
Security access medium according to claim 23 wherein the printing of each part by separate passes result in registration variation from a predetermined position which variation may be measured and compared with predetermined limits.
Claim 29
Dependent Claim
94 words
A security access system using a medium according to claim 19 having means for activation of said first part and said second part of initiating measurement of said standard measurable value by causing said substrate to pass from its latent state to its active state, means to measure each part of the substance, means to compare each part to predetermined limits within said system and to compare the values determined from each part falling within the limits with each other to determine a validity value which is recorded in a store in the system.
Claim 30
Dependent Claim
29 words
The system according to claim 27 further including means to reject the medium if the values of each part of the substance do not fall within said predetermined limits.
Claim 31
Dependent Claim
26 words
A security access medium according to claim 19 wherein said parts comprises a plurality of magnetic areas at least some of which have different magnetic properties.
Claim 32
Dependent Claim
20 words
A security access medium according to claim 29 wherein said magnetic areas are spaced from one another a variable distance.
Claim 33
Dependent Claim
31 words
A security access medium according to claim 30 wherein one or more of the spaced magnetic areas of similar magnetic properties overlap and/or adjoin spaced magnetic areas having different magnetic properties.
Claim 34
Dependent Claim
17 words
A security access medium according to claim 30 wherein said spacing varies randomly due to printing variances.
Claim 35
Dependent Claim
19 words
A security access medium according to claim 29 wherein said areas are formed as bars aligned in a track.
Claim 36
Dependent Claim
34 words
A security access medium according to claim 33 wherein said track represents a direction of reading said magnetic bars and said bars are inclined at an angle with respect to said direction of reading.
Claim 37
Dependent Claim
30 words
A security access medium according to claim 29 wherein said magnetic areas have a random amount of magnetic material due to variances in printing of the areas of said parts.
Claim 38
Dependent Claim
40 words
A security access medium according to claim 19 wherein the standard measurable value of the active state is determined by measurement of the magnetic properties of a plurality of magnetic areas, at least some of which have different magnetic properties.
Claim 39
Dependent Claim
36 words
A security access medium according to claim 36 wherein said magnetic areas are a plurality of magnetic bars and the measurement of values is a function of the magnetic properties of magnetic ink of said bars.
Claim 40
Dependent Claim
43 words
A security access medium according to claim 36 wherein said measurement of the standard measurable values is a function of both the magnetic properties of the magnetic inks of said bars and of the relative spacing of said bars along a reading track.
Claim 41
Dependent Claim
57 words
A security access medium according to claim 19 wherein the standard measurable value determined by measurement of magnetic properties includes a value dependent upon a difference determined by a measurement of the spacing of a plurality of magnetic bars of a first magnetic ink and a spacing of a plurality of bars of a second magnetic ink.
Claim 42
Dependent Claim
28 words
A security access medium according to claim 19 wherein the standard measurable value of the active state peculiar to the particular credit card is recorded on the medium.
Claim 43
Dependent Claim
29 words
A security access medium according to claim 40 wherein the said standard measurable value of the active state is recorded on the medium after it is encrypted and/or encoded.
Claim 44
Dependent Claim
27 words
A security access medium according to claim 41 wherein the encrypted and/or encoded value is such that the information recorded on the medium is a random value.
References Cited (Backward Citations)
US3697729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |