Headphone

Details Headphone Headphone

1994-11-16

1999-10-26

Shooman, Ted

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

1401

Patent

active

D04157630

REFERENCES:
patent: D196654 (1963-10-01), Van Den Berh
patent: D287849 (1987-01-01), O'Malley et al.
patent: D297324 (1988-08-01), Kohno
patent: 2353070 (1944-07-01), Pitkin, Jr.
patent: 4542803 (1985-09-01), Houng
patent: 4654898 (1987-04-01), Ishikawa
patent: 4850055 (1989-07-01), Hwang
patent: 4856118 (1989-08-01), Sapiejewski
patent: 4922542 (1990-05-01), Sapiejewski
patent: 4944361 (1990-07-01), Lindgren et al.

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