US Patent No: 6,587,683

Unconditional call forwarding in a wireless centrex services system

Stats

Jul 1, 2003
Issued date
Dec 13, 1999
filing date
09/458,831
serial no
In Force
status

Importance

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Abstract

The instant invention discloses a method and system for providing a novel wireless centrex service that untethers subscribers from the immobility associated with traditional desktop telephones. Essentially, the present invention extends the benefits of wireless voice and data services to subscribers having a need to move within a plurality of localities such as business and hospital campuses. In accordance with the invention, a wireless telephone subscriber can use a standard cellular/PCS telephone as a wireless extension of their desktop phone, while in the proximity of a miniature radio base station capable of communicating with the PCS/cellular telephone. The advantage of such a system is that a subscriber can use the same cellular/PCS telephone that provides service in the public network in the wireless centrex environment. Additionally, the wireless centrex system provides services and features which are similar to those offered to regular centrex telephone subscribers. Exemplary features include, caller ID, call waiting, call hold, call transfer, call forwarding and voice messaging.

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First Claim

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Related Publications

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Patent Owner(s)

Patent Owner	Address	Total Patents
AT&T CORP.	NEW YORK, NY	4119

International Classification(s)

H04M:TELEPHONIC COMMUNICATION

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Chow, Albert	Hillsdale, NJ	43	832
Kim, Jinman	Chatham, NJ	41	653
Walker, Hopeton	Haledon, NJ	26	1065
Wang, Spencer	Tainan, TW	55	1929
Ying, Wenchu	Cedar Knolls, NJ	49	753

Cited Art

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Patent Citation Ranking

Forward Cites

Patent Info	# Cites	Year
BERTRUM TECHNOLOGIES LLC (6)
7,353,018 Enhanced wireless handset, including direct handset-to-handset communication mode	12	2003
7,693,542 Enhanced wireless handset, including direct handset-to-handset communication mode	3	2004
7,885,684 Enhanced wireless handset, including direct handset-to-handset communication mode	2	2010
8,019,381 Enhanced wireless handset, including direct handset-to-handset communication mode	2	2011
8,265,691 Enhanced wireless handset, including direct handset-to-handset communication mode	0	2011
8,346,169 Enhanced wireless handset, including direct handset-to-handset communication mode	0	2012
AT&T INTELLECTUAL PROPERTY I, L.P. (4)
7,769,392 Method and system for forwarding wireless communications	3	2003
7,885,657 System and method of transitioning between cellular and voice over internet protocol communication	0	2009
8,280,030 Call routing system and method of using the same	0	2009
8,027,700 Method and system for forwarding communications	0	2010
SBC KNOWLEDGE VENTURES, L.P. (3)
7,403,793 Enhanced wireless handset, including direct handset-to-handset communication mode	25	2003
7,577,427 System and method of transitioning between cellular and voice over internet protocol communication	6	2003
8,005,204 Call routing system and method of using the same	2	2005
SPRINT SPECTRUM L.P. (3)
7,551,920 Signal strength-based call forwarding for wireless phones	1	2003
7,260,399 Method and system for asymmetric handoff of wireless communication sessions	23	2004
7,395,085 Method and system for notifying a multi-mode mobile station of an incoming call	3	2005
T-MOBILE DEUTSCHLAND GMBH (2)
8,019,327 Control of call delivery and call forwarding of telecommunication connections, especially in multi-device configurations	0	2004
8,260,277 Control of call delivery and call forwarding of telecommunication connections, especially in multi-device configurations	0	2011
WEST CORPORATION (2)
8,060,366 System, method, and computer-readable medium for verbal control of a conference call	2	2007
8,380,521 System, method and computer-readable medium for verbal control of a conference call	0	2011
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
8,369,494 Method and apparatus for selective silencing of telephone ringing	0	2011

Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jan 1, 2015

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

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Patent Longevity	Forward Citations