Intercommunication apparatus without a hand set

Details Intercommunication apparatus without a hand set Intercommunication apparatus without a hand set

1990-09-19

1992-12-29

Fay, Jr., Horace B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03320952

REFERENCES:
patent: D304338 (1989-10-01), Serman
patent: D305423 (1990-01-01), Gilmore et al.
patent: D305537 (1990-01-01), Gilmore
patent: D305538 (1990-01-01), Gilmore et al.
patent: D315557 (1991-03-01), Grewe et al.
patent: D317762 (1991-06-01), Watanabe
patent: D321348 (1991-11-01), Harden et al.
patent: D321870 (1991-11-01), Beecher et al.
patent: D325381 (1992-04-01), Dennis et al.
patent: D326450 (1992-05-01), Watanabe

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