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Patents Grantslast 30 patents

Information Patent Grant
Multiple queue resource management
- Patent number 5,515,428
- Issue date May 7, 1996
- Mitel Corporation
- Mark R. Sestak
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for testing a subscriber line group marker of...
- Patent number 4,169,221
- Issue date Sep 25, 1979
- Gordon R. Wilson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for custom calling features in a telephone system
- Patent number 3,997,731
- Issue date Dec 14, 1976
- International Telephone & Telegraph Corporation
- Charles David Wilmot
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3714378
- Patent number 3,714,378
- Issue date Jan 30, 1973
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
2241031
- Patent number 2,241,031
- Issue date May 6, 1941
- H04 - ELECTRIC COMMUNICATION TECHNIQUE