SOLID STATE KEY FOR CONTROLLING ACCESS TO COMPUTER SOFTWARE

A semiconductor device (12) that functions as a key (12) to control access to a software program resident in a computer (68). The device (12) includes a continuously running pulse generator (60) that produces an output representative of real time, a shift register permanently storing a unique number...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	CARGILE, WILLIAM, P
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CALCULATING CHECKING-DEVICES COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING GENERATING RANDOM NUMBERS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS
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