Voice operated intercommunication system
United States Patent 2819340
US Patent References:
Loud-speaking and amplified microphone telephone exchange
- - 2102903
Voice operated switch for a duplex system
- - 2424069
Voice-controlled two-way communication system
- - 2477275
Spraying device
- - 2545489
Loud-speaking and amplified microphone telephone exchange
- - 2102903
Voice operated switch for a duplex system
- - 2424069
Voice-controlled two-way communication system
- - 2477275
Spraying device
- - 2545489
Inventors:
Brody, Stanley S.
Publication Date:
01/07/1958
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Assignee:
Brody, Stanley S.
Primary Class:
Other Classes:
379/388.050
International Classes:
H04M9/00