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IP telephone system, IP telephone apparatus and communications method
US 20060067305A1
Filed
: 08/03/2005
Published: 03/30/2006
Est. Priority Date
: 08/26/2004
Status: Active Grant
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Current Assignee
Panasonic Corporation
(Panasonic Holdings Corporation)
Original Assignee
Matsushita Electric Industrial Company Limited
(Panasonic Holdings Corporation)
Inventors
Miyajima, Akira
,
Kobayashi, Kazuto
Granted Patent
US 7,729,341 B2
Time in Patent Office
Days
Field of Search
US Class Current
370/352
CPC Class Codes
H04L 61/4535
using an address exchange p...
H04L 65/1073
Registration or de-registra...
H04L 65/1101
Session protocols
H04L 65/1104
Session initiation protocol...
H04L 65/401
wherein the services involv...
H04M 1/2535
adapted for voice communica...
H04M 3/42374
where the information is pr...
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