Title:
Alarm system
United States Patent 3257653

Inventors:
Mccorkindale, Lawrence W.
Publication Date:
06/21/1966
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Assignee:
BENRUS WATCH COMPANY INC
Primary Class:
340/517
Other Classes:
340/539.100, 341/176, 340/529, 327/1, 340/539.170
International Classes:
G08B19/00; G08B23/00; G08B25/10; G08B29/18; G08B29/00
US Patent References:
2924724Time delay circuits
2979706Radio warning system
3149317Radio alarm
3208061Protective alarm system for metal-enclosed apparatus