Microphone

Details Microphone Microphone

1990-02-09

1992-06-30

Rademaker, Charles A.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Patent

active

D03274802

REFERENCES:
patent: D150458 (1948-08-01), Pike
patent: D178541 (1956-08-01), Schell
patent: D252511 (1979-07-01), Genz
patent: 1569398 (1926-01-01), Scher
patent: 2558278 (1951-06-01), Stone

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