Transducer

Details Transducer Transducer

1990-04-09

1993-02-23

Feifer, Melvin B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Patent

active

D03334686

REFERENCES:
patent: D215853 (1969-11-01), Zar
patent: D244550 (1977-05-01), Zuroski
patent: D254252 (1980-02-01), Matsubara
patent: D303970 (1989-10-01), Collins
Stereo Review, Dec. 1987, p. 95, Speaker at lower right corner of page.

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