Microphone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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1401

Patent

active

D04074076

REFERENCES:
patent: D209515 (1967-12-01), Thomsen
patent: D235662 (1975-07-01), Mox
patent: D239722 (1976-04-01), Schmidt
patent: 3415245 (1968-12-01), Yamamoto et al.
Targ and Dinner, p. 101, microphone model No. 515SA, Apr. 1970.

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