Matthew R. Kretsinger

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Fenton, MO, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for tracking wireless telephone minutes used and providing a...
- Patent number 7,167,699
- Issue date Jan 23, 2007
- Minute Guard, L.L.C.
- Matthew R. Kretsinger
- H04 - ELECTRIC COMMUNICATION TECHNIQUE