Hiroaki ASHIWA

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical information recording medium
- Patent number 8,437,243
- Issue date May 7, 2013
- Sharp Kabushiki Kaisha
- Hideharu Tajima
- G11 - INFORMATION STORAGE
Information Patent Grant
Focus optical system and optical disc master exposure apparatus
- Patent number 7,933,189
- Issue date Apr 26, 2011
- Panasonic Corporation
- Takeshi Omori
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL INFORMATION RECORDING MEDIUM
- Publication number 20120263029
- Publication date Oct 18, 2012
- Sharp Kabushiki Kaisha
- Hideharu Tajima
- G11 - INFORMATION STORAGE
Information Patent Application
FOCUS OPTICAL SYSTEM AND OPTICAL DISC MASTER EXPOSURE APPARATUS
- Publication number 20090262634
- Publication date Oct 22, 2009
- Takeshi OMORI
- G11 - INFORMATION STORAGE