Title:
Burglar alarm system
United States Patent 3158850
US Patent References:
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Apparatus for and method for controlling grinding devices
- - 2235928
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- - 2579347
Alarm circuit operated by microphone
- - 1643759
Nonaccumulative bandit alarm retard device
- - 2007371
Control of revolving beacons
- - 2008408
Apparatus for and method for controlling grinding devices
- - 2235928
Color temperature meter
- - 2579347
Inventors:
Poznanski, Robert L.
Publication Date:
11/24/1964
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Assignee:
Poznanski, Robert L.
Primary Class:
Other Classes:
109/38, 340/566
International Classes:
G08B13/22
US Patent References:
| 2701874 | Burglar alarm system |