Four-gang jackbox assembly

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

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D13152, D14256

Patent

active

D03646254

REFERENCES:
patent: D313417 (1991-01-01), Graham et al.
patent: D347438 (1994-05-01), Smith
patent: 4729059 (1988-03-01), Wang
patent: 4734061 (1988-03-01), Randall, Jr. et al.
patent: 4749359 (1988-06-01), White
patent: 4911655 (1990-03-01), Pinyan et al.
patent: 5153911 (1992-10-01), Smith
Sound-Powered Telephone Jack Box, Comdial Telephone Systems, Inc., Charlottsville, Va., Comdial Telelphone Systems 1983 Catalog, p. 4.

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