Douglas Daniel Gardner

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Arlington, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Logic and mathematical puzzle
- Patent number 7,887,055
- Issue date Feb 15, 2011
- Douglas Daniel Gardner
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
LOGIC AND MATHEMATICAL PUZZLE
- Publication number 20100252993
- Publication date Oct 7, 2010
- Douglas Daniel Gardner
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Application
LOGIC AND MATHEMATICAL PUZZLE
- Publication number 20100207325
- Publication date Aug 19, 2010
- Douglas Daniel Gardner
- A63 - SPORTS GAMES AMUSEMENTS