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Tennis racket
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Patent number 4,911,444
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Issue date Mar 27, 1990
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 4,667,963
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Issue date May 26, 1987
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 4,635,941
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Issue date Jan 13, 1987
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 4,630,827
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Issue date Dec 23, 1986
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 4,582,321
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Issue date Apr 15, 1986
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club head
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Patent number 4,534,558
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Issue date Aug 13, 1985
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Yonex Kabushiki Kaisha
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Minoru Yoneyama
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A63 - SPORTS GAMES AMUSEMENTS