Walter D. Warren

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic pushbutton dial system for a subscriber telephone
- Patent number 4,012,600
- Issue date Mar 15, 1977
- Texas Instruments Incorporated
- Walter D. Warren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic dial system for a subscriber telephone
- Patent number 4,011,414
- Issue date Mar 8, 1977
- Texas Instruments Incorporated
- Walter D. Warren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE