03971916 is referenced by 151 patents and cites 2 patents.

Data, for example, data relating to a bank account, is carried on the person in the form of a small portable means such as a flat card containing encapsulated logic microstructures. The circuitry includes a memory and its control circuits, with inhibitor means preventing access to predetermined sections of the memory. The portable means cooperates with data-transfer means provided at fixed locations. Credit entries in the card are summed and the debit entries are summed and subtracted from the credit entries. Any credit balance may be used to effect a purchase or to obtain an issue of cash money. Coupling of the card and data-transfer means is effected optically by light-emitting diodes cooperating with photovoltaic piles, or by direct electrical contact. Prohibited memory sections carry a code actuating a lock-out latch system. Alternatively a predetermined collection of addresses in the memory is prohibited, setting up one of these addresses actuates the lock-out.

Title
Methods of data storage and data storage systems
Application Number
5/560873
Publication Number
3971916
Application Date
March 21, 1975
Publication Date
July 27, 1976
Inventor
Roland Moreno
Paris
FR
Assignee
Societe Internationale
FR
IPC
G06F 7/02
G06K 19/00
G06K 1/14
G06K 5/00
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