Hisakazu Ohkawara

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Writing controlling device and a color image forming apparatus
- Patent number 7,629,991
- Issue date Dec 8, 2009
- Ricoh Company, Ltd.
- Hisakazu Ohkawara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,460,159
- Issue date Dec 2, 2008
- Ricoh Company, Limited
- Hisakazu Ohkawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image forming apparatus for correcting magnification of image
- Patent number 7,391,431
- Issue date Jun 24, 2008
- Ricoh Company, Ltd.
- Hisakazu Ohkawara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
Image forming apparatus for correcting magnification of image
- Publication number 20060055902
- Publication date Mar 16, 2006
- Hisakazu Ohkawara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20050206744
- Publication date Sep 22, 2005
- Hisakazu Ohkawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE