Norris M. Hall

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Mount Airy, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for call screening
- Patent number 7,447,645
- Issue date Nov 4, 2008
- Arbinet-theexchange, Inc.
- Tom Spragle
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Method and system for call screening
- Publication number 20040172265
- Publication date Sep 2, 2004
- Arbinet-thexchange, Inc.
- Tom Spragle
- G06 - COMPUTING CALCULATING COUNTING