Takumi Koshimizu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing glass substrate for magnetic disk and method f...
- Patent number 9,038,417
- Issue date May 26, 2015
- Hoya Corporation
- Toshio Takizawa
- B24 - GRINDING POLISHING
Information Patent Grant
Method for producing glass substrate for magnetic disk and method f...
- Patent number 8,763,428
- Issue date Jul 1, 2014
- Hoya Corporation
- Toshio Takizawa
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR PRODUCING GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD F...
- Publication number 20140248424
- Publication date Sep 4, 2014
- HOYA CORPORATION
- Toshio Takizawa
- G11 - INFORMATION STORAGE
Information Patent Application
Method For Producing Glass Substrate For Magnetic Disk And Method F...
- Publication number 20090158775
- Publication date Jun 25, 2009
- HOYA CORPORATION
- Toshio Takizawa
- B24 - GRINDING POLISHING