Speaker cover panel

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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D03484688

REFERENCES:
patent: D210026 (1968-01-01), Kahn
patent: D211092 (1968-05-01), Kahn
patent: D242150 (1976-11-01), Pearson
patent: D283130 (1986-03-01), Boenning
patent: D295746 (1988-05-01), Ridinger
patent: D312222 (1990-11-01), Sawyer
patent: D313593 (1991-01-01), Morooka
patent: D324864 (1992-03-01), Hector
patent: D329239 (1992-09-01), Hahn
patent: 4860369 (1989-08-01), Koshimura et al.
Sound Communications, Oct. 1984 p. 41 Intercom System.

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