Headphone

Details Headphone Headphone

1988-01-26

1990-08-21

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03100812

REFERENCES:
patent: D286772 (1986-11-01), Pope
patent: D292205 (1987-10-01), Kikutani
patent: D297324 (1988-08-01), Kohno

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