PBX communication system

Details PBX communication system PBX communication system

2007-04-24

2007-04-24

Rademaker, Charles A. (Department: 2916)

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Element or attachment

Design Patent

active

29236318

CLAIM:
The ornamental design for a PBX communication system, as shown and described.

REFERENCES:
patent: D394266 (1998-05-01), Hogenbirk
patent: D413893 (1999-09-01), Luzbetak et al.
patent: D435041 (2000-12-01), Coker et al.
patent: D453331 (2002-02-01), Probasco et al.
patent: 6510226 (2003-01-01), Thomann et al.
patent: D478580 (2003-08-01), Schmidt et al.
patent: D482678 (2003-11-01), Chung
patent: D490802 (2004-06-01), Beck et al.
patent: D494574 (2004-08-01), Schmidt et al.

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