Microphone

Details Microphone Microphone

1977-04-01

1978-04-11

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1401

Patent

active

D02477076

REFERENCES:
patent: D213567 (1969-03-01), Kahn
patent: D239722 (1976-04-01), Schmidt
patent: 3201530 (1965-08-01), Levy et al.
patent: 3459902 (1969-08-01), Warning
patent: 3527902 (1970-09-01), Liempd

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