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Pitching system and method
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Patent number 5,359,986
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Issue date Nov 1, 1994
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Golf Players Inc.
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Earl K. Magrath
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club
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Patent number 4,869,507
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Issue date Sep 26, 1989
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Players Golf, Inc.
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Douglas Sahm
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A63 - SPORTS GAMES AMUSEMENTS
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Golf club
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Patent number 4,754,977
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Issue date Jul 5, 1988
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Players Golf, Inc.
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Douglas Sahm
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A63 - SPORTS GAMES AMUSEMENTS