Masaaki Ishiyama

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Hanamaki, JP

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Patents Grantslast 30 patents

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
Information Patent Grant
Optical information recording medium having multi-layered structure...
- Patent number 5,251,202
- Issue date Oct 5, 1993
- Ricoh Company, Ltd.
- Yujiro Kaneko
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

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