Yoichiro Shimizu

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Tsukuba-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of polishing glass substrate for information recording media...
- Patent number 6,749,487
- Issue date Jun 15, 2004
- Hoya Corporation
- Koji Okuhata
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Method of polishing glass substrate for information recording media...
- Publication number 20030162482
- Publication date Aug 28, 2003
- NIPPON SHEET GLASS CO., LTD.
- Koji Okuhata
- B24 - GRINDING POLISHING