Toshimichi Nasukawa

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Iwate, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical element, polarization filter, optical isolator, and optical...
- Patent number 8,830,585
- Issue date Sep 9, 2014
- Ricoh Company, Ltd.
- Hideaki Hirai
- G02 - OPTICS
Information Patent Grant
Optical pickup and optical information processing device
- Patent number 8,259,555
- Issue date Sep 4, 2012
- Ricoh Company, Ltd.
- Yukiko Hamano
- G11 - INFORMATION STORAGE
Information Patent Grant
Reflecting wavelength plate and optical pickup using reflecting wav...
- Patent number 8,154,976
- Issue date Apr 10, 2012
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Grant
Reflecting wavelength plate and optical pickup using reflecting wav...
- Patent number 8,154,977
- Issue date Apr 10, 2012
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Grant
Image input apparatus, image input method, personal authentication...
- Patent number 8,085,312
- Issue date Dec 27, 2011
- Ricoh Company, Ltd.
- Nobuhiro Morita
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Optical pickup and optical data processing apparatus
- Patent number 7,502,300
- Issue date Mar 10, 2009
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL ELEMENT, POLARIZATION FILTER, OPTICAL ISOLATOR, AND OPTICAL...
- Publication number 20120002280
- Publication date Jan 5, 2012
- Hideaki Hirai
- G02 - OPTICS
Information Patent Application
REFLECTING WAVELENGTH PLATE AND OPTICAL PICKUP USING REFLECTING WAV...
- Publication number 20100278029
- Publication date Nov 4, 2010
- RICOH COMPANY, LTD.
- Hideaki HIRAI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP AND OPTICAL INFORMATION PROCESSING DEVICE
- Publication number 20100135130
- Publication date Jun 3, 2010
- Yukiko Hamano
- G11 - INFORMATION STORAGE
Information Patent Application
REFLECTING WAVELENGTH PLATE AND OPTICAL PICKUP USING REFLECTING WAV...
- Publication number 20100054110
- Publication date Mar 4, 2010
- RICOH COMAPANY, LTD.
- Hideaki HIRAI
- G11 - INFORMATION STORAGE
Information Patent Application
Image Input Apparatus, Image Input Method, Personal Authentication...
- Publication number 20080316323
- Publication date Dec 25, 2008
- Nobuhiro Morita
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Optical pickup and optical data processing apparatus
- Publication number 20050025028
- Publication date Feb 3, 2005
- Hideaki Hirai
- G11 - INFORMATION STORAGE