Akihiro Yamakage

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Iwate, JP

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Patents Grantslast 30 patents

Information Patent Grant
Projection optical system
- Patent number 8,777,421
- Issue date Jul 15, 2014
- Ricoh Company, Ltd.
- Atsushi Takaura
- G02 - OPTICS
Information Patent Grant
Projection optical apparatus
- Patent number 8,529,070
- Issue date Sep 10, 2013
- Ricoh Company, Ltd.
- Atsushi Takaura
- G02 - OPTICS
Information Patent Grant
Optical system, color information displaying method, optical deflec...
- Patent number 7,345,823
- Issue date Mar 18, 2008
- Ricoh Company, Ltd.
- Takeshi Nanjo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
PROJECTION OPTICAL SYSTEM
- Publication number 20130308106
- Publication date Nov 21, 2013
- Atsushi Takaura
- G02 - OPTICS
Information Patent Application
PROJECTION OPTICAL APPARATUS
- Publication number 20100195061
- Publication date Aug 5, 2010
- Atsushi Takaura
- G02 - OPTICS
Information Patent Application
Optical system, color information displaying method, optical deflec...
- Publication number 20060104597
- Publication date May 18, 2006
- Takeshi Nanjo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE