Cuthbert C. Cheung

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Belleville, CA

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Patents Grantslast 30 patents

Information Patent Grant
Localization of call routing for TDM sets in an IP network
- Patent number 7,333,480
- Issue date Feb 19, 2008
- Nortel Networks Limited
- Gwen Clarke
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Internet protocol (IP) telecommunication
- Patent number 6,556,565
- Issue date Apr 29, 2003
- Nortel Networks Limited
- David P. Ward
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network based distributed PBX with connection loss survival features
- Patent number 6,424,700
- Issue date Jul 23, 2002
- Nortel Networks Corporation
- Michel Thibon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE