David K. Vognsen

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Cedar Rapids, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method for providing prepaid services via an internet pr...
- Patent number 8,175,965
- Issue date May 8, 2012
- Verizon Business Global LLC
- Richard G. Moore
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ISN call interrupt
- Patent number 6,782,083
- Issue date Aug 24, 2004
- MCI, Inc.
- Dean C. Marchand
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
ISN call interrupt
- Publication number 20020191767
- Publication date Dec 19, 2002
- Dean C. Marchand
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
System and method for providing prepaid services via an internet pr...
- Publication number 20020046255
- Publication date Apr 18, 2002
- Richard G. Moore
- G06 - COMPUTING CALCULATING COUNTING