G08B 27 - Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations

Patents for G08B 27 - Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations (1,111)
07/1977
07/26/1977	US4038649 Smoke detection alarm device
06/1977
06/21/1977	US4031467 Alerting process and system of apparatus therefor
05/1977
05/10/1977	US4023146 Method for computing and evaluating emergency priority and evacuation routes for high rise buildings, mines and the like
04/1977
04/19/1977	US4019139 Interaction multi-station alarm system
03/1977
03/29/1977	US4015074 Voluntary information transmitting apparatus in a wired television system
12/1976
12/07/1976	US3996578 Alarm system
11/1976
11/23/1976	US3993955 Method of and apparatus for establishing emergency communications in a two-way cable television system
08/1976
08/31/1976	US3978466 Alarm system including remote signalling means
08/17/1976	US3975583 Emergency civil defense alarm and communications systems
07/1976
07/13/1976	US3969720 Emergency alarm and evacuation system
06/1976
06/15/1976	US3964047 Fire-alarm audible signaling system permitting selective communications and signaling

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