Speaker volume control module

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

Patent

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Details

1499

Patent

active

D04165594

REFERENCES:
patent: D197668 (1964-03-01), Boldt
patent: D224407 (1972-07-01), Katz
patent: D253289 (1979-10-01), Kato
patent: D375909 (1996-11-01), Dziersk et al.
patent: 2573291 (1951-10-01), Wagenknecht

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