Conference phone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment

Design Patent

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Design Patent

active

29262293

CLAIM:
The ornamental design for a conference phone, as shown and described.

REFERENCES:
patent: D342732 (1993-12-01), Hinman et al.
patent: D411995 (1999-07-01), Chen
patent: D449285 (2001-10-01), Wakefield et al.
patent: D457150 (2002-05-01), Chen
patent: D481371 (2003-10-01), Chen
patent: D488794 (2004-04-01), Chen
patent: D491909 (2004-06-01), Sun
patent: 2003/0053620 (2003-03-01), Chen

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