David D. Brezinski

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Streamwood, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for providing prepaid local telephone services
- Patent number 7,110,512
- Issue date Sep 19, 2006
- SBC Properties, L.P.
- Samuel George Maropis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for providing prepaid local telephone services
- Patent number 7,092,501
- Issue date Aug 15, 2006
- SBC Properties, L.P.
- Samuel George Maropis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for providing prepaid local telephone services
- Publication number 20070121851
- Publication date May 31, 2007
- SBC Properties, LP
- Samuel George Maropis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for providing prepaid local telephone services
- Publication number 20040062371
- Publication date Apr 1, 2004
- Ameritech Corporation
- Samuel George Maropis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND APPARATUS FOR PROVIDING PREPAID LOCAL TELEPHONE SERVICES
- Publication number 20020061092
- Publication date May 23, 2002
- SAMUEL GEORGE MAROPIS
- H04 - ELECTRIC COMMUNICATION TECHNIQUE