Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1981-07-10
1983-10-04
Pitts, Harold I.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235380, 235381, G06K 300, G06K 500
Patent
active
044081197
ABSTRACT:
The object requires a would-be user to supply an authorization code within a predetermined number of attempts, otherwise the object is invalidated. The object has at least one memory (1) in which the results of attempts at use are stored in permanent binary form. The object also includes memory write means (3) and discriminator means (9). These are arranged to distinguish between an un-interrupted sequence of said predetermined number of failed attempts (in which case the object is invalidated) and a sequence of failed attempts which is interrupted by at least one successful attempt.
REFERENCES:
patent: 3866173 (1975-02-01), Moorman
patent: 3906460 (1975-09-01), Halpern
patent: 4092524 (1978-05-01), Moreno
patent: 4105156 (1978-08-01), Dethloff
Pitts Harold I.
Transac-Alcatel-Compagnie pour le Development des Transactions
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