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Cliff Lee Roberts
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Houston, TX, US
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last 30 patents
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Patent Grant
Portable pitching mound
Patent number
7,621,831
Issue date
Nov 24, 2009
Cliff Lee Roberts
A63 - SPORTS GAMES AMUSEMENTS
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last 30 patents
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Patent Application
Portable pitching mound
Publication number
20070117660
Publication date
May 24, 2007
Cliff Lee Roberts
A63 - SPORTS GAMES AMUSEMENTS