Combined microphone, speaker, and amplifier

Details Combined microphone, speaker, and amplifier Combined microphone, speaker, and amplifier

1991-04-19

1993-07-20

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Patent

active

D03375900

REFERENCES:
patent: D253767 (1979-12-01), Peterson
patent: D257144 (1980-09-01), McGourty
patent: D295404 (1988-04-01), Tokiyama
patent: D296098 (1988-06-01), Nagele
patent: D303116 (1989-08-01), Richards
patent: D306298 (1990-02-01), Sawada et al.
patent: D321692 (1991-11-01), Siddoway et al.

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