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Marek Czekanski
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Toronto, CA
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last 30 patents
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Patent Grant
Math game and method
Patent number
7,604,237
Issue date
Oct 20, 2009
Marek Czekanski
A63 - SPORTS GAMES AMUSEMENTS
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last 30 patents
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Patent Application
Math game and method
Publication number
20080169608
Publication date
Jul 17, 2008
Marek Czekanski
A63 - SPORTS GAMES AMUSEMENTS