Headphone

Details Headphone Headphone

1991-02-07

1992-07-21

Rademaker, Charles A.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03280748

REFERENCES:
patent: 2593892 (1952-04-01), Kindel
High Fidelity Magazine, Sep. 1987, p. 9, "Sony" Headphones.

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