Patent classifications
G
PHYSICS
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G08
SIGNALLING
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G08B
SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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17/00
Fire alarms; Alarms responsive to explosion
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G08B17/12
Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
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G08B17/125
by using a video camera to detect fire or smoke
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