US4395628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Access security control
Assignee: Individual
•
Filing: 1981-02-12
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Granted: 1983-07-26
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Expires: 2001-02-12
Abstract
Abstract This invention describes a system for access control, wherein a control card is presented to a control means. If the control card is authenticated, then access is gained. If it is not authenticated, access is not gained, the control card is retained, and an alarm may be sounded. The control card contains at least two means; (1) machine readable indicia identifying the card, and (2) a random pattern of micro spots, which pattern is derived (by direct copying--such as by focused laser beam) from one of a plurality of different patterns, retained in a bank of such micro patterns, each such micro pattern identified by, and selectable in accordance with, different unique indicia, identical with the machine readable indicia on said cards. In use the control card is introduced into the control means and the indicia are read. Master micro pattern corresponding to the indicia is selected from the bank. The card micro pattern and master micro pattern are compared. If the comparison okay, the card is authenticated.
Inventors
- 👤 Daniel Silverman
- 👤 Everett A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:41
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/084; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G06K7/10; G06K7/14; G07; G07C; G07C9/00; G07C9/20; G07F; G07F7/00; G07F7/08; G07F7/086
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
215 words
A system for access control, for selectively granting access on presentation and authentication of a control token, said system comprising A. storage means for a plurality of unique authenticating master coded bit patterns, each in different address locations; a plurality of such address locations in said storage means, each address being an index of a corresponding coded pattern stored therein; B. a plurality of control tokens, each control token comprising an unique object; means on said object for storing in machine readable form an index to one of said coded bit patterns; means on said object for storing in machine readable and writeable form an unique bit pattern comprising an alterable memory access means; each of said control tokens having one of said address locations thereon to index the corresponding stored authenticating master coded bit pattern; C. reading means to which such a control token can be presented, said reading means including means to read said index and to read said coded bit pattern on said token; D. means responsive to said reading means to select from said storage means said coded bit pattern corresponding to said index; and E. means to compare the unique bit pattern read from said token with the stored bit pattern in said storage means corresponding to the read index.
Claim 2
Independent Claim
215 words
A system for access control, for selectively granting access on presentation and authentication of a control token, said system comprising A. storage means for a plurality of unique authenticating master coded bit patterns, each in different address locations; a plurality of such address locations in said storage means, each address being an index of a corresponding coded pattern stored therein; B. a plurality of control tokens, each control token comprising an unique object; means on said object for storing in machine readable form an index to one of said coded bit patterns; means on said object for storing in machine readable and writeable form an unique bit pattern comprising an alterable memory access means; each of said control tokens having one of said address locations thereon to index the corresponding stored authenticating master coded bit pattern; C. reading means to which such a control token can be presented, said reading means including means to read said index and to read said coded bit pattern on said token; D. means responsive to said reading means to select from said storage means said coded bit pattern corresponding to said index; and E. means to compare the unique bit pattern read from said token with the stored bit pattern in said storage means corresponding to the read index.
Claim 3
Dependent Claim
35 words
The system as in claim 1 wherein said coded bit patterns comprise magnetically altered areas and includes means to relatively scan a magnetic reading and writing means along said token over said magnetically altered areas.
Claim 4
Dependent Claim
32 words
The system as in claim 1 which includes a plurality of individual magnetic sensor elements in fixed linear array, which array is congruant with the array of bits in said bit pattern.
Claim 5
Dependent Claim
41 words
The system as in claim 3 including means to relatively oscillate said array of sensor elements and said token, in the direction of said array, whereby bit signals will be generated in said sensor elements in accordance with said bit pattern.
Claim 6
Dependent Claim
14 words
The system as in claim 3 and including means to demagnetize said magnetizable material.
Claim 7
Dependent Claim
45 words
The system as in claim 5 including means after said magnetizable material is demagnetized, and said relative oscillation is stopped, of applying a writing signal to a selected number of said plurality of sensor elements to record a new bit pattern on said magnetizable material.
Claim 8
Dependent Claim
43 words
The system of claim 1 which includes means for substituting for said alterable random access memory another bit pattern from said storage means whereby data stored may be read, written, or up-dated upon presentation of the control token having the altered access memory.
Claim 9
Dependent Claim
68 words
The system of claim 1 wherein said coded bit patterns comprise magnetically alterable areas and includes means to produce a selection of unique bit patterns on said token; and means responsive to said comparison means to select a different unique bit pattern from said means to produce, and to write a new unique bit pattern in said alterable memory means on said token and in said storage means.
References Cited (Backward Citations)
US3999042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |