Headphone

Details Headphone Headphone

1978-06-01

1981-03-03

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 68, D1403

Patent

active

D02584301

REFERENCES:
patent: D235149 (1975-05-01), Dascal
patent: D237307 (1975-10-01), Miyamoto et al.
patent: D244037 (1977-04-01), Warner
patent: D246242 (1977-11-01), Bellini
patent: D246519 (1977-11-01), Koto

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