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Golf club fitting device
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Patent number 6,368,230
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Issue date Apr 9, 2002
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Callaway Golf Company
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Richard C. Helmstetter
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A63 - SPORTS GAMES AMUSEMENTS
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Iron-type golf club head
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Patent number D393035
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Issue date Mar 31, 1998
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Callaway Golf Company
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Donald A. Bistline
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D21 - Games, toys, and sports goods
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Iron-type golf club head
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Patent number D393034
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Issue date Mar 31, 1998
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Callaway Golf Company
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Thomas R. Hilton
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D21 - Games, toys, and sports goods
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Iron type golf club head
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Patent number D393036
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Issue date Mar 31, 1998
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Callaway Golf Company
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Richard C. Helmstetter
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D21 - Games, toys, and sports goods