Speaker box

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

Patent

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D14216

Patent

active

D03468038

REFERENCES:
patent: D187924 (1960-05-01), Shaver et al.
patent: D236836 (1975-09-01), Cerra
patent: D319239 (1991-08-01), Kovner
Crutchfield Winter/Spring 1991 .COPYRGT.1990 p. 41 subwoofer boxes, top.

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