David Robert Stringer

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Knebworth, GB

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Patents Grantslast 30 patents

Information Patent Grant
Presence management system
- Patent number 7,603,411
- Issue date Oct 13, 2009
- Nortel Networks Limited
- Elwyn B Davies
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Intelligent filtering for contact spanning multiple access networks
- Patent number 7,373,428
- Issue date May 13, 2008
- Nortel Networks Limited
- Steven M Armstrong
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System indicating the presence of an individual or group of individ...
- Patent number 7,359,938
- Issue date Apr 15, 2008
- Nortel Networks Limited
- Elwyn B Davies
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Independent contact spanning multiple access networks
- Patent number 7,221,658
- Issue date May 22, 2007
- Nortel Networks Ltd.
- Steven M. Armstrong
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Anonymity in a presence management system
- Patent number 6,853,634
- Issue date Feb 8, 2005
- Nortel Networks Limited
- Elwyn B Davies
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication and presence spanning multiple access networks
- Patent number 6,807,423
- Issue date Oct 19, 2004
- Nortel Networks Limited
- Steven M. Armstrong
- H04 - ELECTRIC COMMUNICATION TECHNIQUE