Nachio Seko

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cleaning method for use in electrophotography
- Patent number 4,640,608
- Issue date Feb 3, 1987
- Ricoh Co., Ltd.
- Toshiaki Higaya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Copying apparatus
- Patent number 4,583,834
- Issue date Apr 22, 1986
- Ricoh Company, Ltd.
- Nachio Seko
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image density adjustment method and apparatus
- Patent number 4,256,401
- Issue date Mar 17, 1981
- Ricoh Company, Ltd.
- Itaru Fujimura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Computer controlled electrostatic copying machine
- Patent number 4,203,663
- Issue date May 20, 1980
- Ricoh Company, Ltd.
- Masaaki Ogura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic copying system having monitoring devices
- Patent number 4,167,322
- Issue date Sep 11, 1979
- Ricoh Company, Ltd.
- Takashi Yano
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY