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Kenichi Ishiguro
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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Developing device and magnet roller for developing device
Patent number
6,330,415
Issue date
Dec 11, 2001
Ricoh Company, Ltd.
Tsuyoshi Imamura
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Developing device and developing roller therefor
Patent number
6,112,042
Issue date
Aug 29, 2000
Ricoh Company, Ltd.
Tsuyoshi Imamura
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device and developing roller therefor
Patent number
6,070,038
Issue date
May 30, 2000
Ricoh Company, Ltd.
Tsuyoshi Imamura
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Cylindrical structural body for use in an image forming apparatus a...
Patent number
5,970,294
Issue date
Oct 19, 1999
Ricoh Company, Ltd.
Kenji Narita
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL