Inventor
MURAI KAZUO
JP17 patents
Patents
17 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
US5475476ADec 12, 1995
Image density control method for an image recorder
RICOH KK44 citations96
US5032904AJul 16, 1991
Color image processing apparatus
RICOH KK64 citations96
US6005673ADec 21, 1999
Facsimile machine and facsimile communication system
RICOH KK22 citations92
US5682572AOct 28, 1997
Image density control method for an image recorder
RICOH KK27 citations92
US5444518AAug 22, 1995
Image forming apparatus which adds identification information to recorded images to prevent forgery
RICOH KK47 citations92
US4979129ADec 18, 1990
Digital color converting apparatus for color image processor
RICOH KK26 citations92
US4962421AOct 9, 1990
Color image generating apparatus
RICOH KK35 citations92
US4667250AMay 19, 1987
Halftone digital image processing device
RICOH KK36 citations92
US4572654AFeb 25, 1986
Image density control method for electrophotography
RICOH KK33 citations92
US4519695AMay 28, 1985
Image density control method for electrophotography
RICOH KK37 citations92
US4639117AJan 27, 1987
Recording image density control method for electrophotography
RICOH KK21 citations82
US5237370AAug 17, 1993
Image density control method for image recorder
RICOH KK10 citations73
US4933874AJun 12, 1990
Printer
RICOH KK15 citations73
US4353299AOct 12, 1982
Automatic control system for offset printing machine
RICOH KK11 citations72
US4539279ASep 3, 1985
Image density control method
RICOH KK5 citations63