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Golf club
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Patent number 5,910,056
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Issue date Jun 8, 1999
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Yamaha Corporation
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Itsushi Nagamoto
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club
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Patent number 5,454,563
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Issue date Oct 3, 1995
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Yamaha Corp.
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Itsushi Nagamoto
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A63 - SPORTS GAMES AMUSEMENTS
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Wood golf club head
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Patent number 5,255,913
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Issue date Oct 26, 1993
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Yamaha Corporation
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Atsushi Tsuchida
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 5,205,560
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Issue date Apr 27, 1993
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Yamaha Corporation
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Toshiharu Hoshi
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 5,120,061
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Issue date Jun 9, 1992
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Yamaha Corporation
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Atsushi Tsuchida
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A63 - SPORTS GAMES AMUSEMENTS