Earpiece for use with telephones

Details Earpiece for use with telephones Earpiece for use with telephones

1991-03-25

1993-11-02

Reid, Stella

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Patent

active

D03409325

REFERENCES:
patent: D309306 (1990-07-01), Weiser et al.
patent: 4736435 (1988-04-01), Yokoyama et al.
patent: 4972492 (1990-11-01), Tanaka et al.

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