Headphone

Details Headphone Headphone

1997-12-23

1999-02-09

Hyder, Philip S.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

1401

Patent

active

D04054490

REFERENCES:
patent: D316861 (1991-05-01), Yoda et al.
patent: D348465 (1994-07-01), Yamatogi
patent: D358389 (1995-05-01), Isono
patent: D358391 (1995-05-01), Isono
patent: D369611 (1996-05-01), Saito
Sony Catalog 84, "Cyber-shot", pp. 237, 238 (Nov. 1996).
Sony Headphone/Active Speaker System Catalog, "WARP/Street Style", p. 10 (Jul. 1997).
Sony Style catalog, spring/summer 1993, p. 283, MDR-A22L Vertical in-the-air Stereo Headphone, 1993.

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