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Detachable skate
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Patent number 6,702,304
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Issue date Mar 9, 2004
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Wei-Yen Chu
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A63 - SPORTS GAMES AMUSEMENTS
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Ice skate blade alignment mechanism
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Patent number 5,137,290
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Issue date Aug 11, 1992
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Iowa State University Research Foundation, Inc.
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Patrick E. Patterson
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A63 - SPORTS GAMES AMUSEMENTS
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3026118
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Patent number 3,026,118
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Issue date Mar 20, 1962
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A63 - SPORTS GAMES AMUSEMENTS
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2244719
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Patent number 2,244,719
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Issue date Jun 10, 1941
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A63 - SPORTS GAMES AMUSEMENTS
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2230553
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Patent number 2,230,553
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Issue date Feb 4, 1941
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A63 - SPORTS GAMES AMUSEMENTS
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2197170
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Patent number 2,197,170
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Issue date Apr 16, 1940
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A63 - SPORTS GAMES AMUSEMENTS
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2118892
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Patent number 2,118,892
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Issue date May 31, 1938
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A63 - SPORTS GAMES AMUSEMENTS
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1991855
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Patent number 1,991,855
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Issue date Feb 19, 1935
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A63 - SPORTS GAMES AMUSEMENTS
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1844025
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Patent number 1,844,025
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Issue date Feb 9, 1932
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A63 - SPORTS GAMES AMUSEMENTS
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1820302
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Patent number 1,820,302
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Issue date Aug 25, 1931
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A63 - SPORTS GAMES AMUSEMENTS
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1773303
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Patent number 1,773,303
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Issue date Aug 19, 1930
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A63 - SPORTS GAMES AMUSEMENTS
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1583277
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Patent number 1,583,277
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Issue date May 4, 1926
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A63 - SPORTS GAMES AMUSEMENTS