Title:
Electronic lock with inductively coupled tuned key card
Document Type and Number:
United States Patent 3344629

Inventors:
Burney, Charles F.
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Sponsored by:
Flash of Genius
Publication Date:
10/03/1967
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Referenced by:
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Assignee:
SYLVANIA ELECTRIC PROD
Primary Class:
70/282
Other Classes:
340/5.610, 331/172, 331/65, 70/277, 340/542, 340/5.300, 334/65, 331/117R, 336/137, 331/42, 336/145
International Classes:
G07C9/00
US Patent References:
2541461Electronic combination switch
2774060Detecting means for stolen goods
2816229Crystal saving arrangement for multichannel high frequency electronic equipment
2921152Key device
3093994Recording secure locking system
3136307Vehicle starting system


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