Yukihiro Chokyu

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Onsen-gun, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical head device with multiple diffracting planes, and an optica...
- Patent number 7,817,524
- Issue date Oct 19, 2010
- Panasonic Corporation
- Hidenori Wada
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Optical pickup, optical disk drive, optical information recording/r...
- Publication number 20080089194
- Publication date Apr 17, 2008
- Keiichi Matsuzaki
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, OPTICAL INFORMATION APPARATUS, COMPUTER, VIDEO...
- Publication number 20080084810
- Publication date Apr 10, 2008
- Matsushita Electric Industrial Co., Ltd.
- Hidenori WADA
- G11 - INFORMATION STORAGE
Information Patent Application
Objective lens element with peripheral diffraction structure and ce...
- Publication number 20080080357
- Publication date Apr 3, 2008
- Matsushita Electric Industrial Co., Ltd.
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE
Information Patent Application
Objective lens element for optical disks and optical head device in...
- Publication number 20050111336
- Publication date May 26, 2005
- MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE