Add-on module for a homogeneous unit telephone set

Details Add-on module for a homogeneous unit telephone set Add-on module for a homogeneous unit telephone set

1989-01-06

1990-03-27

Fay, Jr., Horace B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

D14240, D14149

Patent

active

D03068595

REFERENCES:
patent: D219383 (1970-12-01), Fox et al.
patent: D232226 (1974-07-01), Bee et al.
patent: D236501 (1975-08-01), Conway et al.
patent: D251296 (1979-03-01), Haas
patent: D276156 (1984-10-01), Goodin et al.
patent: D287723 (1987-01-01), Kido
patent: D293319 (1987-12-01), Matsuada et al.
patent: D297535 (1988-09-01), Gagnon
patent: D300028 (1989-02-01), To
patent: D300029 (1989-02-01), Kido et al.
patent: 4773090 (1988-09-01), Goatman
Teleconnect Guide .COPYRGT.1985: Telecom System, p. 24; TIE/Comm. at p. 25; Items #76, #78; & #79.
GTE Supply: Customer Premise Eqt.: Northern Telecom, Unity 20-Button Expansion Module at p. 59.
Telephony, 9-10-82 Northern Telecom Logic System.
CMC Brochure: Corporate Message Center Equip.: 5 Basic Components.

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