Takamasa Yoshikawa

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Glass substrate for data recording medium and manufacturing method...
- Patent number 7,010,939
- Issue date Mar 14, 2006
- Hoya Corporation
- Takamasa Yoshikawa
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Clamping jig for glass substrate, buffer sheet, method for processi...
- Publication number 20050101230
- Publication date May 12, 2005
- HOYA CORPORATION
- Takamasa Yoshikawa
- B24 - GRINDING POLISHING
Information Patent Application
Glass substrate for data recording medium and manufacturing method...
- Publication number 20030228461
- Publication date Dec 11, 2003
- Takamasa Yoshikawa
- B24 - GRINDING POLISHING
Information Patent Application
Clamping jig for glass substrate, buffer sheet, method for processi...
- Publication number 20030082999
- Publication date May 1, 2003
- Nippon Sheet Glass Co., Ltd.
- Takamasa Yoshikawa
- B24 - GRINDING POLISHING