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Tatsuya Hirakawa
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Shizuoka, JP
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Patents Grants
last 30 patents
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Patent Grant
Golf club head and method of manufacturing the same
Patent number
6,752,727
Issue date
Jun 22, 2004
Yamaha Corporation
Mutsumi Harada
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Structure and method of fastening a weight body to a golf club head
Patent number
6,379,265
Issue date
Apr 30, 2002
Yamaha Corporation
Tatsuya Hirakawa
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Golf club head
Patent number
5,586,944
Issue date
Dec 24, 1996
Yamaha Corporation
Itsushi Nagamoto
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Golf club head
Patent number
5,451,048
Issue date
Sep 19, 1995
Yamaha Corporation
Itsushi Magamoto
A63 - SPORTS GAMES AMUSEMENTS
Patents Applications
last 30 patents
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Patent Application
Golf club head and method of manufacturing the same
Publication number
20010014627
Publication date
Aug 16, 2001
Mutsumi Harada
A63 - SPORTS GAMES AMUSEMENTS