David C. Herrera

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for blocking a telephone call
- Patent number 7,907,715
- Issue date Mar 15, 2011
- AT&T Intellectual Property I, L.P.
- John W. Moss
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
System and method for blocking a telephone call
- Publication number 20060285676
- Publication date Dec 21, 2006
- John W. Moss
- H04 - ELECTRIC COMMUNICATION TECHNIQUE