Ryouji Hirai

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical scanning device and image forming apparatus
- Patent number 7,817,177
- Issue date Oct 19, 2010
- Ricoh Company, Limited
- Yoshinori Hayashi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical scanner and image forming apparatus
- Patent number 7,643,191
- Issue date Jan 5, 2010
- Ricoh Company, Ltd.
- Hiroyuki Okuwaki
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL SCANNER AND IMAGE FORMING APPARATUS
- Publication number 20080130078
- Publication date Jun 5, 2008
- Hiroyuki Okuwaki
- G02 - OPTICS
Information Patent Application
OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20060284968
- Publication date Dec 21, 2006
- Yoshinori Hayashi
- G02 - OPTICS