Keith Halford

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Madison, MS, US

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Patents Grantslast 30 patents

Information Patent Grant
Prepaid calling time processing: a method and apparatus for process...
- Patent number 7,945,033
- Issue date May 17, 2011
- AT&T Mobility II LLC
- Keith Halford
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Prepaid calling time processing: a method and apparatus for process...
- Patent number 7,447,300
- Issue date Nov 4, 2008
- AT&T Mobility II LLC
- Keith Halford
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Prepaid calling time processing: a method and apparatus for process...
- Patent number 6,707,894
- Issue date Mar 16, 2004
- AT&T Wireless
- Keith Halford
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Prepaid Calling Time Processing: A Method and Apparatus for Process...
- Publication number 20090034703
- Publication date Feb 5, 2009
- AT&T Mobility II LLC
- Keith Halford
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Prepaid calling time processing: a method and apparatus for process...
- Publication number 20040205022
- Publication date Oct 14, 2004
- Keith Halford
- G06 - COMPUTING CALCULATING COUNTING