Mutsuo Watanabe

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rotation member unit and image forming apparatus
- Patent number 8,180,255
- Issue date May 15, 2012
- Ricoh Company, Ltd.
- Mutsuo Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for supplying toner to an image forming apparatus
- Patent number 4,977,429
- Issue date Dec 11, 1990
- Ricoh Company, Ltd.
- Tatsuo Tani
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 4,967,234
- Issue date Oct 30, 1990
- Ricoh Company, Ltd.
- Tatsuo Tani
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic copying machine
- Patent number 4,785,328
- Issue date Nov 15, 1988
- Ricoh Company, Ltd.
- Yoshiyuki Tanimoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner density sensor for electrostatic copying machine
- Patent number 4,200,388
- Issue date Apr 29, 1980
- Ricoh Company, Ltd.
- Mitsuo Hasebe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY