Head phone

Details Head phone Head phone

1977-09-08

1980-04-01

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 68, D1402

Patent

active

D02546167

REFERENCES:
patent: D237307 (1975-10-01), Miyamoto
patent: D244300 (1977-05-01), Besasie
patent: 3984885 (1976-10-01), Yoshimura et al.
patent: 4037064 (1977-07-01), Yasuda

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