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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25/00
Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
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G08B25/004
Alarm propagated along alternative communication path or using alternative communication medium according to a hierarchy of available ways to communicate, e.g. if Wi-Fi® not available use GSM
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