Inventor
SHOSHI MASAYUKI
JP34 patents
⚠️ This page may combine multiple inventors who share the name “SHOSHI MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
32 patentsUS5492784AFeb 20, 1996
Positively-chargeable single-layered type electrophotographic photoconductor
RICOH KK106 citations97
US4992109AFeb 12, 1991
Photoelectric conversion element
RICOH KK28 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
US6074792AJun 13, 2000
Tetraazaporphyrin pigment for use in electrophotographic photoconductor and electrophotographic photoconductor using the same
RICOH KK23 citations92
US6068956AMay 30, 2000
Electrophotographic photoconductor
RICOH KK20 citations92
US5942362AAug 24, 1999
Electrophotographic photoconductor
RICOH KK24 citations92
US5700614ADec 23, 1997
cyclopentadiene derivative compounds and electrophotographic photoconductor comprising one cyclopentadiene derivative compound
RICOH KK21 citations92
US5486438AJan 23, 1996
Electrophotographic photoconductor
RICOH KK25 citations92
US5350653ASep 27, 1994
Electrophotographic photoconductor
RICOH KK28 citations92
US6849367B2Feb 1, 2005
Electrophotographic photoconductor, process for forming an image, image forming apparatus and a process cartridge for the same
RICOH KK22 citations91
US7175958B2Feb 13, 2007
Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same
RICOH KK12 citations82
US7348113B2Mar 25, 2008
Electrophotographic photoconductor comprising a polycarbonate resin having a dihydroxy diphenyl ether unit
RICOH KK10 citations80
US5387487AFeb 7, 1995
Electrophotographic photoconductor
RICOH KK19 citations80
US5227512AJul 13, 1993
Stilbene compound, intermediate for producing the stilbene compound, method of producing the stilbene compound, and liquid crystal composition containing the stilbene compound
RICOH KK5 citations74
US5159084AOct 27, 1992
Optically active oxazoline compounds, liquid crystal composition containing the same and optical switching method using the same
RICOH KK6 citations74
US5072043ADec 10, 1991
Styrene derivatives and electrophotographic photoconductor comprising one of the styrene derivatives
RICOH KK9 citations74
US4603097AJul 29, 1986
Styrene derivatives and electrophotographic photoconductor comprising one of the styrene derivatives
RICOH KK10 citations74
US4567124AJan 28, 1986
Electrophotographic element with trisazo photoconductor and an amine substituted charge transfer material
RICOH KK15 citations74
US4444844AApr 24, 1984
Thermosensitive recording material
RICOH KK13 citations74
US5750762AMay 12, 1998
Cyclopentadiene derivative compounds and electrophotographic photoconductor comprising one cyclopentadiene derivative compound
RICOH KK13 citations73
US5618935AApr 8, 1997
Tricyclic pyrazine compound and electrophotographic photoconductor comprising the same
RICOH KK6 citations71
US5460909AOct 24, 1995
Pyrazine compound and electrophotographic photoconductor comprising the same
RICOH KK10 citations71
US7556902B2Jul 7, 2009
Aromatic polyester resin, and electrophotographic photoconductor and image forming apparatus using thereof
RICOH KK2 citations63
US7309552B2Dec 18, 2007
Electrophotographic photoconductor, electrophotography, electrophotographic apparatus, process cartridge for electrophotographic apparatus and azo compound
RICOH KK4 citations63
US5314997AMay 24, 1994
Optically active azo compound, producing method thereof, and liquid crystal composition containing said compound
RICOH KK4 citations63
US5310503AMay 10, 1994
Stilbene compound, intermediate for producing the stilbene compound, method of producing the stilbene compound, and liquid crystal composition containing the stilbene compound
RICOH KK4 citations63
US5292896AMar 8, 1994
Amino styrene derivatives
RICOH KK5 citations63
US5234623AAug 10, 1993
Optically active oxazoline compounds, liquid crystal composition containing the same and optical switching method using the same
RICOH KK5 citations63
US7452640B2Nov 18, 2008
Electrophotographic photoconductor for liquid development, image forming apparatus having the same, and image forming method
RICOH KK1 citations52