Inventor · disambiguated record
Kazukiyo Nagai
Also filed as: NAGAI KAZUKIYO
107 granted patents·11 pending applications·2,583 citations·filing 1989–2019
99Inventor score
Top patents by PatentIndex Score
118 records- 0198US9234110B2Ink for inkjet recording, and ink cartridge, inkjet recording method, inkjet recorder, ink-recorded matter and method of producing the ink-recorded matter using the inkKATOH KEITA·Filed 2015·Granted Jan 12, 2016·14 cites·14 claims
- 0298US6548216B2Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefromRICOH KK·Filed 2001·Granted Apr 15, 2003·77 cites·17 claims
- 0398US6210848B1Electrophotographic photoconductor, and process cartridge and image forming apparatus using the sameRICOH KK·Filed 2000·Granted Apr 3, 2001·103 cites·26 claims
- 0497US7160658B2Electrophotographic photoreceptor, and image forming method, image forming apparatus, and image forming apparatus processing unit using sameRICOH KK·Filed 2005·Granted Jan 9, 2007·31 cites·9 claims
- 0597US6492079B2Electrophotographic photoconductor, image forming apparatus, and process cartridge using the photoconductorRICOH KK·Filed 2001·Granted Dec 10, 2002·84 cites·17 claims
- 0697US6444387B2Image 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
- 0797US5420288AElectroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compoundsRICOH KK·Filed 1993·Granted May 30, 1995·83 cites·41 claims
- 0896US8192904B2Electrophotographic photoconductor, and image forming apparatus and process cartridge using the sameNAGAI KAZUKIYO·Filed 2007·Granted Jun 5, 2012·37 cites·14 claims
- 0996US7416823B2Electrophotographic photoconductor, and image formation method, image formation apparatus, and process cartridge for image formation apparatus using the sameRICOH KK·Filed 2005·Granted Aug 26, 2008·27 cites·10 claims
- 1096US7122284B2Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefromRICOH KK·Filed 2005·Granted Oct 17, 2006·17 cites·3 claims
- 1196US6936388B2Electrophotographic photoreceptor, and image forming method, image forming apparatus, and image forming apparatus processing unit using sameRICOH KK·Filed 2002·Granted Aug 30, 2005·59 cites·13 claims
- 1296US6187492B1Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 1999·Granted Feb 13, 2001·81 cites·6 claims
- 1395US9850391B2Ink, ink stored container, inkjet printing method, and inkjet printing deviceFUKUOKA MASAYUKI·Filed 2016·Granted Dec 26, 2017·8 cites·15 claims
- 1495US7361438B2Electrophotographic photoconductor, and image forming process, image forming apparatus and process cartridge for an image forming apparatus using the sameRICOH KK·Filed 2006·Granted Apr 22, 2008·19 cites·35 claims
- 1595US7179573B2Electrophotographic photoconductor, and image forming process, image forming apparatus and process cartridge for an image forming apparatus using the sameRICOH KK·Filed 2004·Granted Feb 20, 2007·46 cites·19 claims
- 1695US7175957B2Electrophotographic photoconductor, and image forming process, image forming apparatus and process cartridge for an image forming apparatus using the sameRICOH KK·Filed 2004·Granted Feb 13, 2007·49 cites·35 claims
- 1795US6899983B2Electrophotographic photoconductor, electrophotographic apparatus and process cartridgeRICOH KK·Filed 2003·Granted May 31, 2005·63 cites·54 claims
- 1895US5942363AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Aug 24, 1999·72 cites·22 claims
- 1995US5846680AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Dec 8, 1998·70 cites·22 claims
- 2095US5350459AOrganic photovoltaic elementRICOH KK·Filed 1993·Granted Sep 27, 1994·150 cites·6 claims
- 2194US9441129B2Ink for inkjet recording, ink container, and inkjet recording deviceKATOH KEITA·Filed 2015·Granted Sep 13, 2016·6 cites·7 claims
- 2294US6191249B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1999·Granted Feb 20, 2001·64 cites·22 claims
- 2394US5910561AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted Jun 8, 1999·60 cites·22 claims
- 2494US5840454AAromatic polycarbonate and electrophotographic photosensitive medium using sameRICOH KK·Filed 1996·Granted Nov 24, 1998·62 cites·15 claims
- 2594US5789128AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Aug 4, 1998·73 cites·28 claims
- 2693US8960885B2Ink for inkjet recording, and ink cartridge, inkjet recording method, inkjet recorder, ink-recorded matter and method of producing the ink-recorded matter using the inkKATOH KEITA·Filed 2013·Granted Feb 24, 2015·7 cites·2 claims
- 2793US6596449B2Electrophotographic photoreceptor, and process cartridge and electrophotographic image forming apparatus using the electrophotographic photoreceptorRICOH KK·Filed 2001·Granted Jul 22, 2003·45 cites·63 claims
- 2893US6576386B1Aromatic 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
- 2993US6316577B1Electrophotographic photoconductor and aromatic polycarbonate resin for use thereinHODOGAYA CHEMICAL CO LTD·Filed 2000·Granted Nov 13, 2001·34 cites·22 claims
- 3093US6303736B1Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 2000·Granted Oct 16, 2001·37 cites·6 claims
- 3193US6069224AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1998·Granted May 30, 2000·54 cites·28 claims
- 3293US5656401AElectroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compoundsRICOH KK·Filed 1994·Granted Aug 12, 1997·76 cites·21 claims
- 3392US8974895B2Inkjet ink, ink storage container, inkjet recording device, and recorded matterNARUSE MITSURU·Filed 2014·Granted Mar 10, 2015·7 cites·7 claims
- 3492US6486293B1Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 2000·Granted Nov 26, 2002·36 cites·18 claims
- 3592US6187494B1Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductorRICOH KK·Filed 1999·Granted Feb 13, 2001·62 cites·11 claims
- 3691US6790571B2Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatusRICOH KK·Filed 2002·Granted Sep 14, 2004·31 cites·6 claims
- 3791US6027846AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Feb 22, 2000·49 cites·7 claims
- 3891US5723243AElectrophotographic photoconductor and aromatic polycarbonate resin for use thereinRICOH KK·Filed 1996·Granted Mar 3, 1998·57 cites·44 claims
- 3991US5597925AMethod of producing oxadiazole compoundsRICOH KK·Filed 1995·Granted Jan 28, 1997·67 cites·2 claims
- 4090US7399563B2Electrophotographic photoconductor, and image forming process, image forming apparatus and process cartridge for an image forming apparatus using the sameRICOH KK·Filed 2007·Granted Jul 15, 2008·13 cites·19 claims
- 4190US6664361B2Diphenol compound, aromatic polycarbonate and electrophotoconductive photoconductorRICOH KK·Filed 2001·Granted Dec 16, 2003·35 cites·19 claims
- 4290US5610309AElectroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compoundsRICOH KK·Filed 1995·Granted Mar 11, 1997·63 cites·3 claims
- 4389US10233341B2Ink, method of manufacturing ink, and ink cartridgeKOIZUKA YUUSUKE·Filed 2016·Granted Mar 19, 2019·2 cites·6 claims
- 4489US6018014AAromatic polycarbonate and electrophotographic photosensitive medium using sameRICOH KK·Filed 1998·Granted Jan 25, 2000·41 cites·9 claims
- 4588US9353274B1Ink, ink cartridge, inkjet recording device, and copolymerKATOH KEITA·Filed 2015·Granted May 31, 2016·2 cites·10 claims
- 4688US9028056B1Ink for inkjet recording, ink container, inkjet recorder and recorded matterNARUSE MITSURU·Filed 2014·Granted May 12, 2015·4 cites·17 claims
- 4787US9359522B2Ink composition, ink cartridge, inkjet recording device, and inkjet printed matterRICOH CO LTD·Filed 2014·Granted Jun 7, 2016·9 cites·12 claims
- 4887US6974654B2Electrophotographic photoconductor, image forming method and apparatus, and process cartridge using the photoconductor, and long-chain alkyl group containing bisphenol compound and polymer made therefromRICOH KK·Filed 2003·Granted Dec 13, 2005·19 cites·17 claims
- 4986US7056633B2Electrophotographic photoconductor, image forming method and apparatus, and process cartidge using the photocondutor, and long-chain alkyl group containing bisphenol compound and polymer made therefromRICOH KK·Filed 2003·Granted Jun 6, 2006·19 cites·39 claims
- 5085US9217089B2Ink for inkjet recordingNAGAI KAZUKIYO·Filed 2014·Granted Dec 22, 2015·8 cites·18 claims
Showing the top 50 of 118 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →