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Round Lake, IL, United States of America

Douglas Marshall

USPTO Granted Patents = 5

Average Co-Inventor Count = 5.7

ph-index = 3

Forward Citations = 73(Granted Patents)

Company Filing History:

Ameritech Corporation

Sbc Properties, L.p.

At&t Knowledge Ventures, LP

4. 1 out of 16,507

At&t Intellectual Property I, LP

Years Active: 2001-2011

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8036354 - Calling-party-pays call processing for cellular and paging (2011-10-11),

2. 7366292 - Call management reports (2008-04-29),

3. 7257209 - Calling-party-pays call processing for cellular and paging (2007-08-14),

4. 6570970 - Calling-party-pays call processing for cellular and paging (2003-05-27),

5. 6263056 - Calling-party-pays call processing for cellular and paging (2001-07-17),

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