Variable telephone ringer

Details Variable telephone ringer Variable telephone ringer

1995-07-12

1996-06-25

Asch, Jeffrey

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D13162, D14243

Patent

active

D03711358

REFERENCES:
patent: D239838 (1976-05-01), Crimmins
patent: D255563 (1980-06-01), Brooksby et al.
patent: D277282 (1985-01-01), Barton, III et al.
patent: D286403 (1986-10-01), Parshad et al.
patent: D329062 (1992-09-01), Chin
patent: D356797 (1995-03-01), Young
patent: 2924670 (1960-02-01), Dee
patent: 4727572 (1988-02-01), Whitney
patent: 4833709 (1989-05-01), Pasinski et al.
patent: 4856055 (1989-08-01), Schwartz
B. A. Pargh 1991 Spring/Summer Catalog p. 324, MHEBES Calling Line Identifier 20.

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