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Hirohisa Ohtsuka
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Saitama-ken, JP
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last 30 patents
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Patent Grant
Image forming apparatus
Patent number
5,629,755
Issue date
May 13, 1997
Ricoh Company, Ltd.
Hirohisa Ohtsuka
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus having a contact charging member and a clea...
Patent number
5,610,691
Issue date
Mar 11, 1997
Ricoh Company, Ltd.
Sadao Takahashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of and system for cleaning a charge inducing member
Patent number
5,572,293
Issue date
Nov 5, 1996
Ricoh Company, Ltd.
Nobuo Kikuchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image recording apparatus having a toner quantity control unit
Patent number
5,526,100
Issue date
Jun 11, 1996
Ricoh Company, Ltd.
Naomi Misago
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY