John H. Darnell

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Myersville, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Open center returning flying polygon
- Patent number 6,837,813
- Issue date Jan 4, 2005
- John H. Darnell
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Returning flying polygon
- Patent number 6,443,862
- Issue date Sep 3, 2002
- John H. Darnell
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Open center returning flying polygon
- Publication number 20030092515
- Publication date May 15, 2003
- John H. Darnell
- A63 - SPORTS GAMES AMUSEMENTS