Donald Alan Turner

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McKinney, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of and system for interrupting and parking calls in a switch...
- Patent number 6,330,318
- Issue date Dec 11, 2001
- MCI WorldCom, Inc.
- Donald A. Turner
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for call disposition messaging
- Patent number 6,304,640
- Issue date Oct 16, 2001
- MCI Communications Corporation
- Timothy Darland
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for calling card validation hubbing
- Patent number 5,825,857
- Issue date Oct 20, 1998
- MCI Communications Corporation
- Luis Reto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication gateway
- Patent number 5,793,771
- Issue date Aug 11, 1998
- MCI Communications Corporation
- Timothy E. Darland
- H04 - ELECTRIC COMMUNICATION TECHNIQUE