Inventor
GRAHAM KENNETH D
US4 patents
Patents
4 patentsUS5070629ADec 10, 1991
Sweet spot sole construction
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US5860226AJan 19, 1999
Shoe construction
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US5561920AOct 8, 1996
Shoe construction having an energy return system
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US5402588AApr 4, 1995
Sole construction
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