Telephone set

Details Telephone set Telephone set

1992-07-14

1994-03-29

Douglas, Alan P.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03455572

REFERENCES:
patent: D305025 (1989-12-01), Lino
patent: D306730 (1990-03-01), Sugano et al.
patent: D307426 (1990-04-01), Ohta et al.
patent: D316857 (1991-05-01), Park
patent: D319054 (1991-08-01), Appleby
patent: D330201 (1992-10-01), Preece et al.
Electra Mark II (1985).
The Rolm Phone Family (1989).
Digital & Electronic Telephones (1990).
Center ISDN Set M5317T (Dec. 1989).

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