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Keishi Ohsawa
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Yokohama, JP
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last 30 patents
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Patent Grant
Multi-color image forming apparatus capable of preventing contamina...
Patent number
5,911,093
Issue date
Jun 8, 1999
Canon Kabushiki Kaisha
Keishi Ohsawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus in which carrying force for a mixing toner...
Patent number
5,890,038
Issue date
Mar 30, 1999
Canon Kabushiki Kaisha
Keishi Ohsawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing sleeve having an outer ceramic layer developing device f...
Patent number
5,563,690
Issue date
Oct 8, 1996
Canon Kabushiki Kaisha
Keisuke Hasegawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Powder conveying device
Patent number
5,414,497
Issue date
May 9, 1995
Canon Kabushiki Kaisha
Hiroaki Tsuchiya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Powder conveying device
Patent number
5,270,484
Issue date
Dec 14, 1993
Canon Kabushiki Kaisha
Hiroaki Tsuchiya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Cleaning device
Patent number
4,739,370
Issue date
Apr 19, 1988
Canon Kabushiki Kaisha
Nobutoshi Yoshida
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY