Douglas Marshall

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Round Lake, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Calling-party-pays call processing for cellular and paging
- Patent number 8,036,354
- Issue date Oct 11, 2011
- AT&T Intellectual Property I, L.P.
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call management reports
- Patent number 7,366,292
- Issue date Apr 29, 2008
- AT&T Knowledge Ventures, L.P.
- Dianna Inara Tiliks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Calling-party-pays call processing for cellular and paging
- Patent number 7,257,209
- Issue date Aug 14, 2007
- SBC Properties, L.P.
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Calling-party-pays call processing for cellular and paging
- Patent number 6,570,970
- Issue date May 27, 2003
- Ameritech Corporation
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Calling-party-pays call processing for cellular and paging
- Patent number 6,263,056
- Issue date Jul 17, 2001
- Ameritech Corporation
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CALL MANAGEMENT REPORTS
- Publication number 20080152119
- Publication date Jun 26, 2008
- AT&T KNOWLEDGE VENTURES, L.P.
- Dianna Inara Tiliks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Calling-party-pas call processing for cellular and paging
- Publication number 20070253542
- Publication date Nov 1, 2007
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
System and method for inter-working centrex with a managed VoIP pro...
- Publication number 20060133350
- Publication date Jun 22, 2006
- Robert P. Lowmaster
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Calling-party-pays call processing for cellular and paging
- Publication number 20030220098
- Publication date Nov 27, 2003
- Ameritech Corporation
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Call management reports
- Publication number 20030086552
- Publication date May 8, 2003
- SBC TECHNOLOGY RESOURCES, INC.
- Dianna Inara Tiliks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Calling-party-pays call processing for cellular and paging
- Publication number 20020015483
- Publication date Feb 7, 2002
- Ameritech Corporation
- Carol Shifrin Gruchala
- H04 - ELECTRIC COMMUNICATION TECHNIQUE