Inventor
SHIMADA TOMOYUKI
JP135 patents
⚠️ This page may combine multiple inventors who share the name “SHIMADA TOMOYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
48 patentsUS6861188B2Mar 1, 2005
Electrophotographic photoreceptor, and image forming method, image forming apparatus and process cartridge therefor using the photoreceptor
RICOH KK77 citations98
US6548216B2Apr 15, 2003
Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefrom
RICOH KK77 citations98
US6492079B2Dec 10, 2002
Electrophotographic photoconductor, image forming apparatus, and process cartridge using the photoconductor
RICOH KK84 citations98
US6191249B1Feb 20, 2001
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK64 citations96
US6069224AMay 30, 2000
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK54 citations96
US6027846AFeb 22, 2000
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK49 citations96
US5942363AAug 24, 1999
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK72 citations96
US5910561AJun 8, 1999
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK60 citations96
US5853935ADec 29, 1998
Electrophotographic photoconductor
RICOH KK63 citations96
US5846680ADec 8, 1998
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK70 citations96
US5840454ANov 24, 1998
Aromatic polycarbonate and electrophotographic photosensitive medium using same
RICOH KK62 citations96
US5789128AAug 4, 1998
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK73 citations96
US5747204AMay 5, 1998
Electrophotographic photoconductor and aromatic polycarbonate resin for use in the same
RICOH KK56 citations96
US5723243AMar 3, 1998
Electrophotographic photoconductor and aromatic polycarbonate resin for use therein
RICOH KK57 citations96
US5153073AOct 6, 1992
Electroluminescent device
RICOH KK80 citations96
US4957838ASep 18, 1990
Electrophotographic photoconductor and triphenylamine compounds for use in the same
RICOH KK79 citations96
US7122284B2Oct 17, 2006
Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefrom
RICOH KK17 citations93
US7056633B2Jun 6, 2006
Electrophotographic photoconductor, image forming method and apparatus, and process cartidge using the photocondutor, and long-chain alkyl group containing bisphenol compound and polymer made therefrom
RICOH KK19 citations93
US7018755B2Mar 28, 2006
Electrophotographic photoconductor, electrophotography method using the same, electrophotographic apparatus, electrographic apparatus process cartridge and electrophotographic photoconductor outermost surface layer coating solution
RICOH KK48 citations93
US6974654B2Dec 13, 2005
Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefrom
RICOH KK19 citations93
US6596449B2Jul 22, 2003
Electrophotographic photoreceptor, and process cartridge and electrophotographic image forming apparatus using the electrophotographic photoreceptor
RICOH KK45 citations93
US6184362B1Feb 6, 2001
Electrophotographic photoconductor, azo compounds for use in the same, and intermediates for producing the azo compounds
RICOH KK15 citations93
US6103435AAug 15, 2000
Electrophotographic photoconductor, AZO compounds for use in the same, and intermediates for producing the AZO compounds
RICOH KK18 citations93
US5981124ANov 9, 1999
Electrophotographic photoconductor, azo compounds for use in the same, and intermediates for producing the azo compounds
RICOH KK24 citations93
US5830980ANov 3, 1998
Electrophotographic photoconductor, aromatic polycarbonate resin for use in the same, and method of producing the aromatic polycarbonate resin
RICOH KK28 citations93
US5672728ASep 30, 1997
Method for preparing the pyrenylamine derivatives
RICOH KK25 citations93
US5616805AApr 1, 1997
Methods for preparing pyrenylamine derivatives and intermediates
RICOH KK24 citations93
US5604065AFeb 18, 1997
Electrophotographic photoconductor and triphenylamine compound for use therein
RICOH KK21 citations93
US5599995AFeb 4, 1997
Electrophotographic photoconductor comprising pyrenylamine derivative, the pyrenylamine derivative, intermediate for preparation thereof, and method for preparing the pyrenylamine derivative and the intermediate
RICOH KK25 citations93
US5587516ADec 24, 1996
Electrophotographic photoconductor comprising pyrenylamine derivative, the pyrenylamine derivative, intermediate for preparation thereof, and method for preparing the pyrenylamine derivative and the intermediate
RICOH KK21 citations93
US5576132ANov 19, 1996
Electrophotographic photoconductor comprising pyrenylamine derivative
RICOH KK23 citations93
US5457232AOct 10, 1995
Pyrenylamine derivatives having unsaturated bond
RICOH KK27 citations93
US5370954ADec 6, 1994
Photoconductive composition containing trisazo and disazo compounds
RICOH KK25 citations93
US5344985ASep 6, 1994
Aldehyde intermediates for the preparation of pyrenylamine derivatives having unsaturated bond
RICOH KK29 citations93
US5219692AJun 15, 1993
Electrophotographic photoconductors and tertiary amine compounds having condensed polycyclic group for use in the same
RICOH KK33 citations93
US6544701B2Apr 8, 2003
Reaction product, process for the production thereof, electrophotographic photoconductor using the reaction product, electrophotographic apparatus using the photoconductor, and process cartridge for electrophotographic apparatus
RICOH KK41 citations92
US6524761B2Feb 25, 2003
Mixture of titanyltetraazaporphyrin compounds and electrophotographic photoconductor using the same
RICOH KK19 citations92
US6465648B1Oct 15, 2002
Reaction product, process of producing same, electrophotographic photoconductor using same, electrophotographic apparatus having the photoconductor, and process cartridge for electrophotographic apparatus
RICOH KK37 citations92
US6313288B1Nov 6, 2001
Mixture of titanyltetraazaporphyrin compounds and electrophotographic photoconductor using the same
RICOH KK30 citations92
US6093784AJul 25, 2000
Electrophotographic photoconductor and polycarbonate resin for use therein
RICOH KK40 citations92
US6018014AJan 25, 2000
Aromatic polycarbonate and electrophotographic photosensitive medium using same
RICOH KK41 citations92
US7381511B2Jun 3, 2008
Photoreceptor, image forming method and image forming apparatus using the photoreceptor, process cartridge using the photoreceptor and coating liquid for the photoreceptor
RICOH KK27 citations91
US5312707AMay 17, 1994
Electrophotographic photoconductor and diamine compounds for use in the same
RICOH KK35 citations90
US7112392B2Sep 26, 2006
Electrophotographic photoreceptor, and image forming method, image forming apparatus and process cartridge for image forming apparatus using the electrophotographic photoreceptor
RICOH KK18 citations84
US6271356B1Aug 7, 2001
Electrophotographic photoconductor, azo compounds for use in the same, and intermediates for producing the azo compounds
RICOH KK12 citations82
US5672756ASep 30, 1997
Triphenylamine compound for use in electrophotographic photoconductors
RICOH KK16 citations82
US5663407ASep 2, 1997
Electrophotographic photoconductor, carbonate compound for use in the same, and intermediate compound for producing the carbonate compound
RICOH KK14 citations82
US5550293AAug 27, 1996
Electrophotographic photoconductors and tertiary amine compounds having condensed polycyclic group for use in the same
RICOH KK13 citations82
HODOGAYA CHEMICAL CO LTD
1 patentRICOH CO LTD
1 patentShowing the top 50 of 135 patents by PatentIndex Score.