David G. Robinson

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Boulder, CO, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for conditionally routing calls
- Patent number 6,944,444
- Issue date Sep 13, 2005
- Qwest Communications International Inc.
- Donald E. Gillespie
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for conditionally routing calls
- Patent number 6,678,515
- Issue date Jan 13, 2004
- Qwest Communications International Inc.
- Donald E. Gillespie
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telecommunications system with multi-extension services
- Patent number 6,141,556
- Issue date Oct 31, 2000
- Qwest Communications International Inc.
- Angus O. Dougherty
- H04 - ELECTRIC COMMUNICATION TECHNIQUE