Pay type telephone station volume control push-button switch

Details Pay type telephone station volume control push-button switch Pay type telephone station volume control push-button switch

1992-04-22

1994-07-12

Holtje, Nelson C.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D13171, D14240

Patent

active

D03486753

REFERENCES:
patent: D210949 (1968-05-01), Ratner
patent: D265824 (1982-08-01), Foggia et al.
patent: D282067 (1986-01-01), Inaba
patent: D291566 (1987-08-01), Perry et al.
patent: D302149 (1989-07-01), Ozeki
patent: D316540 (1991-04-01), Hirose
patent: D319628 (1991-09-01), Whitley, III
patent: D328301 (1992-07-01), Brito
patent: 4771367 (1988-09-01), Serr et al.

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