Headphone

Details Headphone Headphone

1992-07-20

1994-10-04

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03511715

REFERENCES:
patent: D291198 (1987-08-01), Bellini
patent: D302429 (1989-07-01), Leer
patent: D331059 (1972-11-01), Sogabe et al.
patent: D342946 (1994-01-01), Hyogo
patent: D342947 (1994-01-01), Totsuka
HFD Sep. 1987 p. 111 "My First Sony Walkie-Talkie Headset".

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