Microphone

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

Patent

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D14227

Patent

active

D03687198

REFERENCES:
patent: D313802 (1991-01-01), Peiker
patent: D357481 (1995-04-01), Giuntoli et al.
patent: 3562446 (1971-02-01), Wolf
patent: 4685137 (1987-08-01), Watson et al.
patent: 4741041 (1988-04-01), Hayashi
Kent Microphones catalog, dated Dec. 7, 1964, p. 12, M-7 Dynamic Microphone.

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