Headphone

Details Headphone Headphone

1991-10-21

1993-06-22

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03366472

REFERENCES:
patent: D222361 (1971-10-01), Hart
patent: D244037 (1977-04-01), Warner et al.
patent: D254616 (1980-04-01), Tabata
patent: D301145 (1989-05-01), Besasie et al.
patent: D313092 (1990-12-01), Nilsson
patent: D317767 (1991-06-01), Banks
patent: 2782423 (1957-02-01), Simon et al.
patent: 5018599 (1991-05-01), Dohi et al.
Telephony, Aug. 2, 1982 p. 15 Headset, bottom.
Radio Shack 1988 Catalog p. 44 Realistic Nova-40.
Popular Mechanics Nov. 1980 p. 96 Pickering 0A-3A Headphone.

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