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Nobuhiro Nakayama
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Numazu, JP
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last 30 patents
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Patent Grant
Multi-color electrophotographic image formation method
Patent number
5,344,732
Issue date
Sep 6, 1994
Ricoh Company, Ltd.
Shunichi Chiba
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming equipment having improved toner sensing
Patent number
5,270,783
Issue date
Dec 14, 1993
Ricoh Company, Ltd.
Takashi Bisaiji
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic image forming apparatus which controls develope...
Patent number
5,227,842
Issue date
Jul 13, 1993
Ricoh Company, Ltd.
Kouji Hayashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Dry type toner for electrophotography
Patent number
5,061,588
Issue date
Oct 29, 1991
Ricoh Company, Ltd.
Hiroyuki Fushimi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Dry type developer for electrophotography
Patent number
4,980,258
Issue date
Dec 25, 1990
Ricoh Company, Ltd.
Mitsuo Aoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Triboelectric charge application member for toner comprising copoly...
Patent number
4,945,022
Issue date
Jul 31, 1990
Ricoh Company, Ltd.
Nobuhiro Nakayama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Magenta color toner for developing latent electrostatic images in c...
Patent number
4,933,250
Issue date
Jun 12, 1990
Ricoh Company Ltd.
Nobuhiro Nakayama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Carrier particles for use in a two-component dry-type developer
Patent number
4,927,728
Issue date
May 22, 1990
Ricoh Company, Ltd.
Tetsuo Isoda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner for developing latent electrostatic images
Patent number
4,908,290
Issue date
Mar 13, 1990
Ricoh Company, Ltd.
Yoichiro Watanabe
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Triboelectric charge application member for toner
Patent number
4,841,331
Issue date
Jun 20, 1989
Ricoh Company, Ltd.
Nobuhiro Nakayama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Carrier particles for use in a developer for developing latent elec...
Patent number
4,672,016
Issue date
Jun 9, 1987
Ricoh Company, Ltd.
Tetsuo Isoda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Silicone resin coated carrier particles for use in a two-component...
Patent number
4,584,254
Issue date
Apr 22, 1986
Ricoh Company, Ltd.
Nobuhiro Nakayama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY