Inventor · disambiguated record
Kazuhiko Umemura
Also filed as: UMEMURA KAZUHIKO
46 granted patents·15 pending applications·1,695 citations·filing 1987–2022
99Inventor score
Top patents by PatentIndex Score
61 records- 0199US8195070B2Developer container, developer supplying device, and image forming apparatusHOSOKAWA HIROSHI·Filed 2011·Granted Jun 5, 2012·47 cites·12 claims
- 0299US8005406B2Developer container, developer supplying device, and image forming apparatusRICOH CO LTD·Filed 2010·Granted Aug 23, 2011·60 cites·18 claims
- 0399US7835673B2Developer container, developer supplying device, and image forming apparatusRICOH CO LTD·Filed 2008·Granted Nov 16, 2010·58 cites·28 claims
- 0499US7697870B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2009·Granted Apr 13, 2010·54 cites·26 claims
- 0599US7519317B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2007·Granted Apr 14, 2009·72 cites·25 claims
- 0699US7480476B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2007·Granted Jan 20, 2009·115 cites·20 claims
- 0799US7321744B2Developer container, developer supplying device, and image forming apparatusRICOH KK·Filed 2004·Granted Jan 22, 2008·111 cites·49 claims
- 0898US7258959B2Toner for electrophotography and image forming apparatusRICOH KK·Filed 2005·Granted Aug 21, 2007·42 cites·34 claims
- 0997US7169525B2Toner, developer, image forming apparatus, process cartridge and image forming processRICOH KK·Filed 2005·Granted Jan 30, 2007·37 cites·26 claims
- 1095US7076192B2Powder conveying device and image forming apparatus using the sameRICOH KK·Filed 2003·Granted Jul 11, 2006·55 cites·16 claims
- 1195US6818369B2Toner for electrostatic image development and image forming method and apparatus using the tonerRICOH KK·Filed 2002·Granted Nov 16, 2004·58 cites·26 claims
- 1294US7398038B2Image forming apparatus using a toner container and a process cartridgeRICOH KK·Filed 2003·Granted Jul 8, 2008·47 cites·23 claims
- 1394US7024133B2Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itselfRICOH KK·Filed 2003·Granted Apr 4, 2006·50 cites·51 claims
- 1494US6828075B2Carrier for electrophotography and developer using the sameRICOH KK·Filed 2002·Granted Dec 7, 2004·52 cites·19 claims
- 1594US6770411B2Negatively chargeable tonerRICOH KK·Filed 2002·Granted Aug 3, 2004·50 cites·9 claims
- 1694US6493529B1Charging device with walls surrounding the electrodes which reduce ozone emissionsRICOH KK·Filed 2000·Granted Dec 10, 2002·56 cites·39 claims
- 1793US7169522B2Toner for developing a latent electrostatic image, developer using the same, full-color toner kit using the same, image-forming apparatus using the same, image-forming process cartridge using the same and image-forming process using the sameRICOH KK·Filed 2003·Granted Jan 30, 2007·42 cites·20 claims
- 1893US6861191B2Dry toner for developing electrostatic imagesRICOH KK·Filed 2002·Granted Mar 1, 2005·45 cites·18 claims
- 1993US6447973B1Liquid developer for developing electrostatic image and image forming methodRICOH KK·Filed 2000·Granted Sep 10, 2002·70 cites·6 claims
- 2093US5061587AToner for electrophotography including fluorine contained graft copolymerRICOH KK·Filed 1989·Granted Oct 29, 1991·44 cites·45 claims
- 2193US4950573AToner for developing latent electrostatic imagesRICOH KK·Filed 1987·Granted Aug 21, 1990·45 cites·5 claims
- 2292US5026621AToner for electrophotographyRICOH KK·Filed 1989·Granted Jun 25, 1991·50 cites·12 claims
- 2391US7172844B2Toner for electrophotography, and image forming process, process cartridge and image forming apparatus using the sameRICOH KK·Filed 2004·Granted Feb 6, 2007·36 cites·15 claims
- 2491US7136610B2Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itselfRICOH KK·Filed 2004·Granted Nov 14, 2006·38 cites·18 claims
- 2591US7024140B2Toner feeder, toner, and electrophotographic image forming apparatus using the toner feeder and tonerRICOH KK·Filed 2004·Granted Apr 4, 2006·36 cites·2 claims
- 2689US11274221B2Ink, ink set, ink container, image forming method, image forming apparatus and recorded matterRICOH CO LTD·Filed 2018·Granted Mar 15, 2022·2 cites·12 claims
- 2789US7212767B2Image forming apparatus and process cartridge removably mounted theretoRICOH KK·Filed 2003·Granted May 1, 2007·27 cites·28 claims
- 2888US7163773B2Toner for developing electrostatic image, developer, process for forming image, and image forming apparatusRICOH KK·Filed 2003·Granted Jan 16, 2007·27 cites·19 claims
- 2987US5952048AInk composition and recording method using the sameRICOH KK·Filed 1997·Granted Sep 14, 1999·57 cites·14 claims
- 3085US5189102AMethod for producing a vinyl resin using a silicon oil solventRICOH KK·Filed 1992·Granted Feb 23, 1993·47 cites·15 claims
- 3183US7288353B2Toner, developer, image developer and image forming apparatusRICOH KK·Filed 2004·Granted Oct 30, 2007·18 cites·17 claims
- 3281US7611815B2External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the tonerRICOH KK·Filed 2003·Granted Nov 3, 2009·15 cites·16 claims
- 3380US11186737B2Ink and printing methodRICOH CO LTD·Filed 2020·Granted Nov 30, 2021·1 cites·13 claims
- 3478US5740507ADensely packed toner container and method of producing the sameRICOH KK·Filed 1996·Granted Apr 14, 1998·57 cites·15 claims
- 3577US7749674B2Toner, developer, image developer and image forming apparatusRICOH KK·Filed 2007·Granted Jul 6, 2010·4 cites·13 claims
- 3677US5759733ALiquid developer for electrostatic electrophotographyRICOH KK·Filed 1992·Granted Jun 2, 1998·22 cites·6 claims
- 3772US7003255B2Image forming apparatus and process cartridgeRICOH KK·Filed 2003·Granted Feb 21, 2006·13 cites·36 claims
- 3870US10414932B2Ink, ink container, and inkjet recording deviceUMEMURA KAZUHIKO·Filed 2016·Granted Sep 17, 2019·1 cites·16 claims
- 3968US11548294B2Method of printing including applying a processing fluid and white ink to a substrate and device for such printingSAIGA TAKUYA·Filed 2021·Granted Jan 10, 2023·0 cites·20 claims
- 4066US11578220B2Ink, ink accommodating unit, printing device and printing methodRICOH CO LTD·Filed 2021·Granted Feb 14, 2023·0 cites·19 claims
- 4164US7413838B2External additives for electrophotographic toner, electrophotographic toner, electrophotographic developer, image forming method and image forming apparatusRICOH KK·Filed 2002·Granted Aug 19, 2008·8 cites·10 claims
- 4263US5328794AFluorine-containing graft copolymer and toner using the sameRICOH KK·Filed 1993·Granted Jul 12, 1994·16 cites·7 claims
- 4361US11059983B2Ink, ink container, inkjet recording device, and recording methodMATSUYAMA AKIHIKO·Filed 2019·Granted Jul 13, 2021·0 cites·14 claims
- 4461US10328722B2Image forming method and image forming apparatusKATOH KEITA·Filed 2018·Granted Jun 25, 2019·0 cites·17 claims
- 4557US11499062B2Ink, ink set, ink container, image forming method, and image forming apparatusRICOH CO LTD·Filed 2018·Granted Nov 15, 2022·0 cites·13 claims
- 4655US5169739ALiquid developer for image fixing method using heat application rollersRICOH KK·Filed 1990·Granted Dec 8, 1992·10 cites·6 claims
- 4754US2023331000A1Printing method, printing apparatus, and printed matterYAMAMOTO SEI·Filed 2021·Application pending·0 cites
- 4854US2023220226A1White ink, non-white ink, ink set, printing set, printing method, and printing apparatusHAGIWARA HIROKI·Filed 2021·Application pending·0 cites
- 4954US2022056299A1Printing method, printing apparatus, and printed matterYAMAMOTO SEI·Filed 2021·Application pending·0 cites
- 5049US2022177718A1Ink and image forming methodUMEMURA KAZUHIKO·Filed 2021·Application pending·0 cites
Showing the top 50 of 61 patent records by PatentIndex Score.
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