Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-06-24
1992-10-20
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
340538, 341176, G08B 1300
Patent
active
051573830
ABSTRACT:
Disclosed is a remote responsive system for warning security personnel or other individuals. The system includes a receiver unit, which is responsive to a remote power switching device, for controlling both a visual and audio warning device. A transmit unit includes the remote responsive power switch for supplying power to the receiver location. The remote power switcher is controlled by a hand-held remote transmitter.
REFERENCES:
patent: 4189721 (1980-02-01), Doell
patent: 4719454 (1988-01-01), Hopkins et al.
patent: 4755792 (1988-07-01), Pezzolo et al.
patent: 4764757 (1988-08-01), DeMarco et al.
patent: 4996517 (1991-02-01), Kringen et al.
patent: 4998095 (1991-03-01), Shields
Litman Richard C.
Mullen Jr. Thomas J.
Ng Jin F.
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