Yasutaka Izumi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical scanner and image forming apparatus
- Patent number 7,271,823
- Issue date Sep 18, 2007
- Ricoh Company, Ltd.
- Yasutaka Izumi
- G02 - OPTICS
Information Patent Grant
Optical scanner and image forming apparatus
- Patent number 7,164,516
- Issue date Jan 16, 2007
- Ricoh Company, Limited
- Yoshinori Hayashi
- G02 - OPTICS
Information Patent Grant
Optical scanner and image forming apparatus
- Patent number 7,106,483
- Issue date Sep 12, 2006
- Ricoh Company, Limited
- Yoshinori Hayashi
- G02 - OPTICS
Information Patent Grant
Edge emitting type light emitting diode array heads
- Patent number 5,606,181
- Issue date Feb 25, 1997
- Ricoh Company, Ltd.
- Nobuo Sakuma
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
Optical scanner and image forming apparatus
- Publication number 20060268382
- Publication date Nov 30, 2006
- Yoshinori Hayashi
- G02 - OPTICS
Information Patent Application
Optical scanner and image forming apparatus
- Publication number 20050093955
- Publication date May 5, 2005
- Yasutaka Izumi
- G02 - OPTICS
Information Patent Application
Optical scanner and image forming apparatus
- Publication number 20050018268
- Publication date Jan 27, 2005
- Yoshinori Hayashi
- G02 - OPTICS