Hands-free telephone

Details Hands-free telephone Hands-free telephone

1993-04-01

1994-09-20

Douglas, Alan P.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14115

Patent

active

D03507475

REFERENCES:
patent: D194507 (1963-02-01), Hollerith et al.
patent: D271394 (1983-11-01), Brown et al.
patent: D285072 (1986-08-01), Hill et al.
patent: D293437 (1987-12-01), Hoshino et al.
patent: D298034 (1988-10-01), Yoshiharu
patent: D308855 (1990-06-01), Schaum
patent: D327881 (1992-07-01), McFarlane
patent: D334384 (1993-03-01), Nye
patent: D337106 (1993-07-01), Jasinski

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