Building protection system
United States Patent 3051934

Inventors:
Lesher, John C.
Publication Date:
08/28/1962
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Assignee:
Martha, Egly H.
Michael, Manchester J.
RAD O LITE INC
Primary Class:
340/539.140
Other Classes:
340/550, 315/159
International Classes:
G08B13/22
US Patent References:
2346889Lighting control system
2390221Alarm system
2730245Automatic control system for hoisting apparatus
2782405Apparatus for detecting motion in a bconfined space
2844762Illumination control
2956269Electronic barrier