Inventor
ISHIGAKI KOUJI
JP16 patents
Patents
16 patentsUS5751854AMay 12, 1998
Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system
RICOH KK181 citations98
US6272248B1Aug 7, 2001
Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system
RICOH KK113 citations97
US5659628AAug 19, 1997
Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function
RICOH KK93 citations96
US5652803AJul 29, 1997
Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function
RICOH KK56 citations96
US6160969ADec 12, 2000
Image forming apparatus with a voltage applying unit for image transfer
RICOH KK57 citations95
US5184184AFeb 2, 1993
Image forming apparatus
RICOH KK25 citations92
US5057867AOct 15, 1991
Image forming apparatus which corrects the image forming factors in response to density sensing means and duration of inactive state
RICOH KK28 citations92
US5245390ASep 14, 1993
Device for adjusting output of image density sensor incorporated in image forming equipment
RICOH KK21 citations88
US5341196AAug 23, 1994
Image forming equipment using a toner cartridge
RICOH KK18 citations74
US5321466AJun 14, 1994
Image forming equipment with reserve mode to prevent unauthorized cancellation of pending job
RICOH KK8 citations74
US5265855ANov 30, 1993
Copier with document support moving means
RICOH KK10 citations74
US5045883ASep 3, 1991
Image density control method using exclusive patterns for an image forming apparatus
RICOH KK7 citations73
US5258248ANov 2, 1993
Image density control method for an image forming apparatus
RICOH KK12 citations72
US5122837AJun 16, 1992
Toner cartridge for an image forming apparatus
RICOH KK8 citations71
US4963938AOct 16, 1990
Toner cartridge for an image forming apparatus
RICOH KK11 citations71
US5028960AJul 2, 1991
Image density control method for an image forming apparatus
RICOH KK4 citations61