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Tina Sigarto
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Raleigh, NC, US
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Patents Grants
last 30 patents
Information
Patent Grant
Secure ATM-based distributed virtual tandem switching system and me...
Patent number
7,843,932
Issue date
Nov 30, 2010
AT&T Labs, Inc.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM-based distributed network switching system
Patent number
7,304,986
Issue date
Dec 4, 2007
AT&T Labs, Inc.
George Coleman Allen, Jr.
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Fault tolerant virtual tandem switch
Patent number
7,227,837
Issue date
Jun 5, 2007
AT&T Labs, Inc.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Secure ATM-based distributed virtual tandem switching system and me...
Patent number
7,136,378
Issue date
Nov 14, 2006
SBC Technology Resources, Inc.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed virtual tandem switch
Patent number
7,095,734
Issue date
Aug 22, 2006
SBC Technology Resources, Inc.
George Coleman Allen, Jr.
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
ATM-based distributed network switching system
Patent number
6,765,903
Issue date
Jul 20, 2004
SBC Technology Resources, Inc.
George Coleman Allen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Secure ATM-based distributed virtual tandem switching system and me...
Patent number
6,757,278
Issue date
Jun 29, 2004
SBC Technology Resources, Inc.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
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Patent Application
FAULT TOLERANT ATM-BASED DISTRIBUTED VIRTUAL TANDEM SWITCHING SYSTE...
Publication number
20070286200
Publication date
Dec 13, 2007
AT&T LABS, INC.
Haifeng BI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SECURE ATM-BASED DISTRIBUTED VIRTUAL TANDEM SWITCHING SYSTEM AND ME...
Publication number
20070008977
Publication date
Jan 11, 2007
SBC TECHNOLOGY RESOURCES, INC.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM-based distributed network switching system
Publication number
20060274735
Publication date
Dec 7, 2006
SBC TECHNOLOGY RESOURCES, INC.
George Coleman Allen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ATM-based distributed network switching system
Publication number
20040233909
Publication date
Nov 25, 2004
SBC TECHNOLOGY RESOURCES, INC.
George Coleman Allen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Secure ATM-based distributed virtual tandem switching system and me...
Publication number
20040179531
Publication date
Sep 16, 2004
SBC TECHNOLOGY RESOURCES, INC.
Haifeng Bi
H04 - ELECTRIC COMMUNICATION TECHNIQUE