Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1987-02-18
1990-06-26
Trafton, David L.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235441, 235492, 34082531, G06K 500
Patent
active
049374370
ABSTRACT:
A security system is provided for controlling access to information stored in a target memory in which an access key carries a random access binary memory which is electronically programmable, electronically alterable, directly electronically readable and non-volatile. The memory carried on the key constitutes an integral portion of the target system memory when the key is inserted into a receptacle. The receptacle has a zero insertion force socket to reduce wear and provide direct electrical connection. The key may have an extremely wide variety of coded information programmed into it; when the key is removed from the receptacle, the target system will not operate correctly since a portion of its memory is effectively missing. The system may be retrofitted into existing target systems or incorporated in future target systems.
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patent: 3641498 (1972-02-01), Hedin
patent: 3761892 (1973-09-01), Bosnyak et al.
patent: 4297569 (1981-10-01), Flies
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patent: 4436993 (1984-03-01), Flies
patent: 4502130 (1985-02-01), Kuckuk
patent: 4522456 (1985-06-01), Wehrmacher
patent: 4549076 (1985-10-01), Flies
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