Joseph Nagel

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Berkeley, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Methods and apparatus for chess instruction
- Patent number 8,109,820
- Issue date Feb 7, 2012
- Ralph Nagel
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Methods & apparatus for chess instruction
- Publication number 20070287518
- Publication date Dec 13, 2007
- Ralph Nagel
- A63 - SPORTS GAMES AMUSEMENTS