Digital lock system having electronic key card
作者： Perron Robert R , Fowler John T
DOI:
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摘要: An electronic lock system in which a coded data word is stored key and, upon insertion of the into lock, compared with master code. A predetermined correspondence between code and causes provision an output signal for actuation or other utilization apparatus. Lack will not cause production can be employed to alarm indication. Digital circuitry both configured permit easy alteration greatly enhance security.
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