Yasuhiro Tokumaru

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Disk protrusion detection/flatness measurement circuit and disk gli...
- Patent number 8,457,926
- Issue date Jun 4, 2013
- Hitachi High-Technologies Corporation
- Kenichi Shitara
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of detecting scratch defect in circumferential direction and...
- Patent number 7,903,361
- Issue date Mar 8, 2011
- Hitachi High-Technologies Corporation
- Sumihiro Maeda
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
DISK PROTRUSION DETECTION/FLATNESS MEASUREMENT CIRCUIT AND DISK GLI...
- Publication number 20110051580
- Publication date Mar 3, 2011
- Hitachi High-Technologies Corporation
- Kenichi SHITARA
- G11 - INFORMATION STORAGE
Information Patent Application
METHOD OF DETECTING SCRATCH DEFECT IN CIRCUMFERENTIAL DIRECTION AND...
- Publication number 20070271487
- Publication date Nov 22, 2007
- Sumihiro Maeda
- G11 - INFORMATION STORAGE