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Toshikazu Hayakawa
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Okaya-shi, JP
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Patents Grants
last 30 patents
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Patent Grant
Method and apparatus for surface treatment of inner surface of member
Patent number
6,688,949
Issue date
Feb 10, 2004
Kyoei Denko Co., Ltd.
Yoshinori Shinbo
B24 - GRINDING POLISHING
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last 30 patents
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Patent Application
Method and apparatus for surface treatment of inner surface of member
Publication number
20020119738
Publication date
Aug 29, 2002
Kyoei Denko Co., Ltd.
Yoshinori Shinbo
B24 - GRINDING POLISHING