Inventor · disambiguated record
Masaomi Sasaki
Also filed as: HASHIMOTO MITSURU · SASAKI MASAOMI · YAMAGUCHI AKIHIRO
170 granted patents·2 pending applications·4,097 citations·filing 1977–2015
99Inventor score
Top patents by PatentIndex Score
172 records- 0198US6210848B1Electrophotographic photoconductor, and process cartridge and image forming apparatus using the sameRICOH KK·Filed 2000·Granted Apr 3, 2001·103 cites·26 claims
- 0298US4957838AElectrophotographic photoconductor and triphenylamine compounds for use in the sameRICOH KK·Filed 1989·Granted Sep 18, 1990·79 cites·20 claims
- 0397US6444387B2Image bearing material, electrophotographic photoreceptor using the image bearing material, and image forming apparatus using the photoreceptorRICOH KK·Filed 2000·Granted Sep 3, 2002·84 cites·50 claims
- 0497US5492784APositively-chargeable single-layered type electrophotographic photoconductorRICOH KK·Filed 1993·Granted Feb 20, 1996·106 cites·9 claims
- 0597US4859556AElectrophotographic photoconductor containing stilbene compoundRICOH KK·Filed 1988·Granted Aug 22, 1989·56 cites·40 claims
- 0697US4245021AElectrophotographic element having charge transport layerRICOH KK·Filed 1979·Granted Jan 13, 1981·85 cites·16 claims
- 0796US6194535B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1999·Granted Feb 27, 2001·85 cites·6 claims
- 0896US6187492B1Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 1999·Granted Feb 13, 2001·81 cites·6 claims
- 0996US6066428AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted May 23, 2000·100 cites·6 claims
- 1096US4892949AStilbene derivativesRICOH KK·Filed 1988·Granted Jan 9, 1990·50 cites·13 claims
- 1196US4620875AAqueous ink compositionRICOH KK·Filed 1985·Granted Nov 4, 1986·55 cites·5 claims
- 1295US5976746AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted Nov 2, 1999·65 cites·12 claims
- 1395US5942363AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Aug 24, 1999·72 cites·22 claims
- 1495US5846680AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Dec 8, 1998·70 cites·22 claims
- 1595US4272598AElectrophotographic material containing disazo compoundsRICOH KK·Filed 1978·Granted Jun 9, 1981·23 cites·54 claims
- 1694US6191249B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1999·Granted Feb 20, 2001·64 cites·22 claims
- 1794US5910561AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted Jun 8, 1999·60 cites·22 claims
- 1894US5840454AAromatic polycarbonate and electrophotographic photosensitive medium using sameRICOH KK·Filed 1996·Granted Nov 24, 1998·62 cites·15 claims
- 1994US5789128AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Aug 4, 1998·73 cites·28 claims
- 2094US5747204AElectrophotographic photoconductor and aromatic polycarbonate resin for use in the sameRICOH KK·Filed 1996·Granted May 5, 1998·56 cites·26 claims
- 2194US5322753AElectrophotographic photoconductor and acrylic acid ester polymer for use in the sameRICOH KK·Filed 1992·Granted Jun 21, 1994·42 cites·11 claims
- 2294US4500355AAqueous ink compositionRICOH KK·Filed 1983·Granted Feb 19, 1985·66 cites·12 claims
- 2393US6576386B1Aromatic block polycarbonate resin, diphenol compound for preparation of the polycarbonate resin, electrophotographic photoconductor, electrophotographic image forming apparatus and process, and process cartridgeRICOH KK·Filed 2000·Granted Jun 10, 2003·39 cites·4 claims
- 2493US6316577B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinHODOGAYA CHEMICAL CO LTD·Filed 2000·Granted Nov 13, 2001·34 cites·22 claims
- 2593US6303736B1Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 2000·Granted Oct 16, 2001·37 cites·6 claims
- 2693US6069224AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted May 30, 2000·54 cites·28 claims
- 2793US5608010APolymers of acrylic acid ester derivatives having a triphenyl amine skeletonRICOH KK·Filed 1995·Granted Mar 4, 1997·42 cites·5 claims
- 2893US5578405AElectrophotographic photoconductor containing disazo and trisazo pigmentsRICOH KK·Filed 1994·Granted Nov 26, 1996·125 cites·55 claims
- 2992US6486293B1Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 2000·Granted Nov 26, 2002·36 cites·18 claims
- 3092US6187494B1Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 1999·Granted Feb 13, 2001·62 cites·11 claims
- 3192US6172176B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1999·Granted Jan 9, 2001·49 cites·12 claims
- 3292US5219692AElectrophotographic photoconductors and tertiary amine compounds having condensed polycyclic group for use in the sameRICOH KK·Filed 1990·Granted Jun 15, 1993·33 cites·26 claims
- 3392US4325871AOrtho-Bis (2-substituted azostyryl) benzene compoundsRICOH KK·Filed 1980·Granted Apr 20, 1982·26 cites·14 claims
- 3491US6790571B2Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatusRICOH KK·Filed 2002·Granted Sep 14, 2004·31 cites·6 claims
- 3591US6027846AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Feb 22, 2000·49 cites·7 claims
- 3691US5723243AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Mar 3, 1998·57 cites·44 claims
- 3791US4606988AStyryl derivatives and electrophotographic photoconductor comprising one styryl derivativeRICOH KK·Filed 1985·Granted Aug 19, 1986·33 cites·10 claims
- 3891US4596754AElectrophotographic printing original plate and electrophotographic plate making process using the printing original plateRICOH KK·Filed 1985·Granted Jun 24, 1986·38 cites·12 claims
- 3990US6664361B2Diphenol compound, aromatic polycarbonate and electrophotoconductive photoconductorRICOH KK·Filed 2001·Granted Dec 16, 2003·35 cites·19 claims
- 4090US6093784AElectrophotographic photoconductor and polycarbonate resin for use thereinRICOH KK·Filed 1994·Granted Jul 25, 2000·40 cites·28 claims
- 4190US5488137AAcrylic acid ester derivative having a triphenyl amine skeletonRICOH KK·Filed 1994·Granted Jan 30, 1996·26 cites·2 claims
- 4290US4672149APhotoelectric transducer elementRICOH KK·Filed 1986·Granted Jun 9, 1987·63 cites·18 claims
- 4389US6018014AAromatic polycarbonate and electrophotographic photosensitive medium using sameRICOH KK·Filed 1998·Granted Jan 25, 2000·41 cites·9 claims
- 4489US5672728AMethod for preparing the pyrenylamine derivativesRICOH KK·Filed 1996·Granted Sep 30, 1997·25 cites·3 claims
- 4589US5459275APyrenylamine derivativesRICOH KK·Filed 1994·Granted Oct 17, 1995·26 cites·3 claims
- 4689US5457232APyrenylamine derivatives having unsaturated bondRICOH KK·Filed 1994·Granted Oct 10, 1995·27 cites·3 claims
- 4789US5344985AAldehyde intermediates for the preparation of pyrenylamine derivatives having unsaturated bondRICOH KK·Filed 1992·Granted Sep 6, 1994·29 cites·9 claims
- 4889US4279981AElectrophotographic elements containing trisazo compoundsRICOH KK·Filed 1978·Granted Jul 21, 1981·28 cites·66 claims
- 4988US5599995AElectrophotographic photoconductor comprising pyrenylamine derivative, the pyrenylamine derivative, intermediate for preparation thereof, and method for preparing the pyrenylamine derivative and the intermediateRICOH KK·Filed 1995·Granted Feb 4, 1997·25 cites·1 claims
- 5087US7893192B2Pi-conjugated polymerRICOH CO LTD·Filed 2007·Granted Feb 22, 2011·7 cites·18 claims
Showing the top 50 of 172 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →