Inventor
SHOJI HISASHI
JP73 patents
⚠️ This page may combine multiple inventors who share the name “SHOJI HISASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
31 patentsUS6721516B2Apr 13, 2004
Image forming apparatus
RICOH KK85 citations98
US6505014B2Jan 7, 2003
Image forming apparatus and an image forming process unit
RICOH KK116 citations98
US6125243ASep 26, 2000
Toner replenishing and developer replacing device for a developing unit of an image forming apparatus
RICOH KK106 citations97
US5915155AJun 22, 1999
Toner replenishing and developer replacing device for a developing unit of an image forming apparatus
RICOH KK110 citations97
US7203431B2Apr 10, 2007
Abnormality determining method, abnormality determining apparatus, and image forming apparatus
RICOH KK54 citations96
US7110917B2Sep 19, 2006
Abnormality determining method, and abnormality determining apparatus and image forming apparatus using same
RICOH KK57 citations96
US6757509B2Jun 29, 2004
Image forming apparatus
RICOH KK56 citations96
US6597885B2Jul 22, 2003
Image forming apparatus having a developing device with a magnet brush
RICOH KK45 citations96
US5937228AAug 10, 1999
Image forming apparatus
RICOH KK60 citations96
US5740494AApr 14, 1998
Configured to enhance toner collecting efficiency and toner redepositing efficiency
RICOH KK91 citations96
US5606408AFeb 25, 1997
Image forming apparatus and cleaning device therefor
RICOH KK73 citations96
US7554574B2Jun 30, 2009
Abnormal state occurrence predicting method, state deciding apparatus, and image forming system
RICOH KK29 citations93
US7457550B2Nov 25, 2008
Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining method
RICOH KK32 citations93
US7327962B2Feb 5, 2008
Abnormality determining method, abnormality determining apparatus, and image forming apparatus
RICOH KK35 citations93
US6978109B2Dec 20, 2005
Image forming apparatus
RICOH KK20 citations93
US6901233B2May 31, 2005
Image forming apparatus
RICOH KK23 citations93
US6823163B2Nov 23, 2004
Image forming apparatus including an electric field having an oscillation component between an image carrier and a developer carrier
RICOH KK20 citations93
US6819901B1Nov 16, 2004
Developing method and a developing device for image forming apparatus
RICOH KK27 citations93
US6456806B2Sep 24, 2002
Developing method, device, and image forming apparatus with magnet brush
RICOH KK22 citations93
US6160979ADec 12, 2000
Image forming apparatus
RICOH KK20 citations93
US5970280AOct 19, 1999
Image forming apparatus having a developing bias control unit
RICOH KK35 citations93
US7313336B2Dec 25, 2007
Method and apparatus for image forming capable of effectively recycling toner
RICOH KK25 citations92
US6778805B2Aug 17, 2004
Image forming apparatus having a developing device with a magnet brush
RICOH KK34 citations92
US5619316AApr 8, 1997
Image forming apparatus
RICOH KK53 citations92
US5309177AMay 3, 1994
Image recording apparatus
RICOH KK27 citations92
US7778555B2Aug 17, 2010
Abnormality determining apparatus, image forming apparatus, copying machine, and information obtaining method
RICOH KK14 citations84
US5051760ASep 24, 1991
Direct image recording apparatus using toner
RICOH KK20 citations81
US7079798B2Jul 18, 2006
Toner transfer back suppressing color image forming apparatus
RICOH KK7 citations74
US6782225B2Aug 24, 2004
Image forming apparatus having plurality of developing sections with particular magnetic flux density
RICOH KK9 citations74
US5999762ADec 7, 1999
Image forming apparatus and method therefor
RICOH KK10 citations74
US5337075AAug 9, 1994
Image forming apparatus capable of readily changing the pixel density of an image
RICOH KK14 citations74
KONISHIROKU PHOTO IND
18 patentsUS4959669ASep 25, 1990
Color correction device for a color image forming apparatus
KONISHIROKU PHOTO IND67 citations96
US4894685AJan 16, 1990
Multicolor image forming method and apparatus
KONISHIROKU PHOTO IND71 citations96
US4599285AJul 8, 1986
Multiplex image reproducing method
KONISHIROKU PHOTO IND38 citations96
US5124747AJun 23, 1992
Color copy machine with detachable process cartridge
KONISHIROKU PHOTO IND25 citations93
US5103303AApr 7, 1992
Multicolor imaging forming apparatus
KONISHIROKU PHOTO IND48 citations93
US4996566AFeb 26, 1991
Multicolor image forming apparatus with separately removable and insertable assembly units
KONISHIROKU PHOTO IND44 citations93
US4994853AFeb 19, 1991
Apparatus for recording color images having interchangeable process cartridges and cartridge information on IC cards
KONISHIROKU PHOTO IND53 citations93
US4797335AJan 10, 1989
Developing method for electrostatic images using composite component developer under non-contacting conditions
KONISHIROKU PHOTO IND25 citations93
US4680625AJul 14, 1987
Method and apparatus for multicolor image forming
KONISHIROKU PHOTO IND36 citations93
US4679929AJul 14, 1987
Multiplex image reproducing apparatus
KONISHIROKU PHOTO IND25 citations93
US5146270ASep 8, 1992
Color image forming apparatus having interchangeable image forming process cartridges
KONISHIROKU PHOTO IND36 citations92
US5036367AJul 30, 1991
Color image forming apparatus
KONISHIROKU PHOTO IND32 citations92
US4814797AMar 21, 1989
Apparatus and method for controlling color dot size in multicolor image
KONISHIROKU PHOTO IND29 citations92
US5107304AApr 21, 1992
Removable cartridge for a color image forming apparatus
KONISHIROKU PHOTO IND38 citations90
US4841332AJun 20, 1989
Toner control for a developer device
KONISHIROKU PHOTO IND23 citations82
US4839692AJun 13, 1989
Apparatus for reproducing multi-color image
KONISHIROKU PHOTO IND22 citations82
US5162821ANov 10, 1992
Color image forming apparatus
KONISHIROKU PHOTO IND15 citations74
US5157483AOct 20, 1992
Multicolor image forming method and apparatus
KONISHIROKU PHOTO IND19 citations74
RICOH CO LTD
1 patentShowing the top 50 of 73 patents by PatentIndex Score.