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Kouji Ishigaki
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Yokohama, JP
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last 30 patents
Information
Patent Grant
Original-discrimination system for discriminating special document,...
Patent number
6,272,248
Issue date
Aug 7, 2001
Ricoh Company, Ltd.
Takashi Saitoh
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Image forming apparatus with a voltage applying unit for image tran...
Patent number
6,160,969
Issue date
Dec 12, 2000
Ricoh Company, Ltd.
Kouji Ishigaki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Original-discrimination system for discriminating special document,...
Patent number
5,751,854
Issue date
May 12, 1998
Ricoh Company, Ltd.
Takashi Saitoh
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Special-document discriminating apparatus and managing system for i...
Patent number
5,659,628
Issue date
Aug 19, 1997
Ricoh Company, Ltd.
Michiyoshi Tachikawa
G07 - CHECKING-DEVICES
Information
Patent Grant
Special-document discriminating apparatus and managing system for i...
Patent number
5,652,803
Issue date
Jul 29, 1997
Ricoh Company, Ltd.
Michiyoshi Tachikawa
G07 - CHECKING-DEVICES
Information
Patent Grant
Image forming equipment using a toner cartridge
Patent number
5,341,196
Issue date
Aug 23, 1994
Ricoh Company, Ltd.
Takashi Hodoshima
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming equipment with reserve mode to prevent unauthorized c...
Patent number
5,321,466
Issue date
Jun 14, 1994
Ricoh Company, Ltd.
Yoshiyuki Kimura
B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information
Patent Grant
Copier with document support moving means
Patent number
5,265,855
Issue date
Nov 30, 1993
Ricoh Company, Ltd.
Yoshiyuki Kimura
B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information
Patent Grant
Image density control method for an image forming apparatus
Patent number
5,258,248
Issue date
Nov 2, 1993
Ricoh Company, Ltd.
Masaki Tokuhashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Device for adjusting output of image density sensor incorporated in...
Patent number
5,245,390
Issue date
Sep 14, 1993
Ricoh Company, Ltd.
Kouji Ishigaki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus
Patent number
5,184,184
Issue date
Feb 2, 1993
Ricoh Company, Ltd.
Keisuke Hayashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner cartridge for an image forming apparatus
Patent number
5,122,837
Issue date
Jun 16, 1992
Ricoh Company, Ltd.
Yoshihide Sonoda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus which corrects the image forming factors in...
Patent number
5,057,867
Issue date
Oct 15, 1991
Ricoh Company, Ltd.
Kouji Ishigaki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image density control method using exclusive patterns for an image...
Patent number
5,045,883
Issue date
Sep 3, 1991
Ricoh Company, Ltd.
Kouji Ishigaki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image density control method for an image forming apparatus
Patent number
5,028,960
Issue date
Jul 2, 1991
Ricoh Company, Ltd.
Wataru Yasuda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner cartridge for an image forming apparatus
Patent number
4,963,938
Issue date
Oct 16, 1990
Ricoh Company, Ltd.
Yoshihide Sonoda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY