1978-11-30
1980-09-23
Brown, Thomas W.
H04M 105
Patent
active
042244820
ABSTRACT:
A mobile microphone-transmitter assembly is disclosed which comprises a microphone, a plurality of infrared light emitting devices, electrical apparatus connected between the microphone and the devices to energize the devices in response to inputs to the microphone and a mechanical structure for supporting the devices to produce a substantially omnidirectional, horizontal radiation pattern when the structure is worn by a user and the devices are energized.
REFERENCES:
patent: 3124657 (1964-03-01), Peterson
patent: 3134074 (1964-05-01), Litke
patent: 3564416 (1971-02-01), Price
patent: 4068093 (1978-01-01), Fidi
patent: 4134007 (1979-01-01), Koreicho et al.
Electronic Design 18, Sep. 1, 1976, "Speech/Hearing Aid Uses Infrared Light Transmitter".
Lese Gregory
Liebler Charles F.
Patel Dilipkumar B.
Bell Telephone Laboratories Incorporated
Brown Thomas W.
Kearns Joseph P.
Logan Hugh L.
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