Microphone

Details Microphone Microphone

1978-06-15

1979-11-20

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1401

Patent

active

D02534681

REFERENCES:
patent: D213567 (1969-03-01), Kahn
patent: D230990 (1974-03-01), Kollesberger, Jr.
patent: D247707 (1978-04-01), Armstrong
patent: 3642558 (1972-02-01), Gorike
Radio Shack, 1977 Electronics Cat., .COPYRGT.1976, p. 33, Electret Condenser Microphone.

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