Combination speaker and microphone assembly

Details Combination speaker and microphone assembly Combination speaker and microphone assembly

1991-11-18

1994-05-10

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D14225

Patent

active

D03468046

REFERENCES:
patent: D175440 (1955-08-01), Palo
patent: D195956 (1963-08-01), Spilman
patent: D203187 (1965-12-01), Deschamps
patent: D264335 (1982-05-01), Huntington
patent: D293239 (1987-12-01), Larson et al.
patent: D295404 (1988-04-01), Tokiyama
patent: D307907 (1990-05-01), Siddoway et al.
patent: 4199721 (1980-04-01), Ono et al.

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