United States Patent 3258757
US Patent References:
Apparatus for indicating and controlling the temperature of products within predetermined limits
- - 2741099
Portable fire alarm
- - 2816280
Indicator lamp test circuit
- - 2839741
Combined illumination device and fire alarm
- - 2915742
Portable thermal alarm and signal system
- - 2982949
Apparatus for indicating and controlling the temperature of products within predetermined limits
- - 2741099
Portable fire alarm
- - 2816280
Indicator lamp test circuit
- - 2839741
Combined illumination device and fire alarm
- - 2915742
Portable thermal alarm and signal system
- - 2982949
Publication Date:
06/28/1966
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Primary Class:
Other Classes:
340/691.100, 340/581, 374/E01.004, 340/593
International Classes:
G01K1/02; G08B5/38; G08B17/06; G01K1/00; G08B5/22