Inventor · disambiguated record
Tomohiro Kubota
Also filed as: KUBOTA TOMOHIRO
89 granted patents·22 pending applications·807 citations·filing 2005–2025
99Inventor score
Top patents by PatentIndex Score
111 records- 0197US8744321B2Developer container, developing device, process unit, and image forming apparatusKUBOTA TOMOHIRO·Filed 2013·Granted Jun 3, 2014·17 cites·30 claims
- 0297US8019254B2Toner conveying device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Sep 13, 2011·32 cites·11 claims
- 0396US10290508B1Method for forming vertical spacers for spacer-defined patterningASM IP HOLDING BV·Filed 2017·Granted May 14, 2019·414 cites·16 claims
- 0495US8792808B2Developer container, developing device, process unit, and image forming apparatusKUBOTA TOMOHIRO·Filed 2013·Granted Jul 29, 2014·7 cites·35 claims
- 0595US8135329B2Toner conveyer device, process cartridge, and image forming apparatusSHIMIZU YOSHIYUKI·Filed 2007·Granted Mar 13, 2012·23 cites·16 claims
- 0695US7424263B2Toner recovery belt conveyor, process cartridge, and image forming apparatus using the sameRICOH KK·Filed 2006·Granted Sep 9, 2008·23 cites·13 claims
- 0794US10175607B2Developer container including a convex portion, a rotator, and a recessKUBOTA TOMOHIRO·Filed 2017·Granted Jan 8, 2019·4 cites·31 claims
- 0893US10381219B1Methods for forming a silicon nitride filmASM IP HOLDING BV·Filed 2018·Granted Aug 13, 2019·17 cites·18 claims
- 0992US9201341B2Developer container, developing device, processing unit, image forming device, and method of manufacturing developer containerTSURITANI SHOH·Filed 2014·Granted Dec 1, 2015·8 cites·16 claims
- 1092US8571426B2Toner supply method, development device, process unit, and image forming apparatusKUBOTA TOMOHIRO·Filed 2011·Granted Oct 29, 2013·8 cites·20 claims
- 1192US8275285B2Process cartridge and image forming apparatusKAWAKAMI YOSHIHIRO·Filed 2008·Granted Sep 25, 2012·15 cites·11 claims
- 1292US7965957B2Developing device and image forming apparatus that uses this developing deviceRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·13 cites·12 claims
- 1392US7945203B2Waste-toner collecting device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2008·Granted May 17, 2011·13 cites·10 claims
- 1492US7890044B2Powder conveyance device, toner conveyance device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2007·Granted Feb 15, 2011·13 cites·13 claims
- 1591US9069284B2Image forming apparatus and powder transport unitSHIMIZU YOSHIYUKI·Filed 2013·Granted Jun 30, 2015·7 cites·12 claims
- 1691US8768203B2Image forming apparatus capable of effectively utilizing interior spaceHAMADA MANABU·Filed 2011·Granted Jul 1, 2014·12 cites·18 claims
- 1791US7979013B2Developing device of image forming apparatusRICOH CO LTD·Filed 2007·Granted Jul 12, 2011·13 cites·15 claims
- 1890US12419155B2Hole-transport layer material, electron-blocking layer material, electron-transport layer material, hole-blocking layer material, light-emitting device, light-emitting apparatus, electronic device, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2022·Granted Sep 16, 2025·1 cites·21 claims
- 1990US12139446B2Arylamine compound, hole-transport layer material, hole-injection layer material, light-emitting device, light-emitting apparatus, electronic apparatus, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2021·Granted Nov 12, 2024·2 cites·23 claims
- 2090US8160476B2Latent image carrier having pairs of first and second positioning protrusions and image forming apparatusSHIMIZU YOSHIYUKI·Filed 2008·Granted Apr 17, 2012·12 cites·20 claims
- 2189US12460130B2Organic compound, light-emitting device, light-emitting apparatus, electronic equipment, lighting device, and electronic deviceSEMICONDUCTOR ENERGY LAB·Filed 2024·Granted Nov 4, 2025·0 cites·21 claims
- 2289US2025338746A1Light-Emitting Device, Electronic Device, and Lighting DeviceSEMICONDUCTOR ENERGY LAB·Filed 2025·Application pending·0 cites
- 2386US8861991B2Developer amount detector, and developer container, development device, and image forming apparatus incorporating sameKUBOTA TOMOHIRO·Filed 2012·Granted Oct 14, 2014·4 cites·18 claims
- 2485US12356791B2Light-emitting device, electronic device, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2023·Granted Jul 8, 2025·0 cites·20 claims
- 2585US11643724B2Method of forming structures using a neutral beamASM IP HOLDING BV·Filed 2020·Granted May 9, 2023·1 cites·17 claims
- 2685US10496013B2Developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2018·Granted Dec 3, 2019·2 cites·13 claims
- 2785US8442414B2Seal member, developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2011·Granted May 14, 2013·3 cites·23 claims
- 2884US12129548B2Method of forming structures using a neutral beamASM IP HOLDING BV·Filed 2023·Granted Oct 29, 2024·0 cites·18 claims
- 2984US7965958B2Developing device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·7 cites·14 claims
- 3084US7917077B2Waste-toner housing device, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 29, 2011·7 cites·14 claims
- 3184US7873302B2Cleaning device and image forming apparatusRICOH CO LTD·Filed 2007·Granted Jan 18, 2011·7 cites·17 claims
- 3282US10811256B2Method for etching a carbon-containing featureASM IP HOLDING BV·Filed 2018·Granted Oct 20, 2020·3 cites·19 claims
- 3382US9141028B2Image forming apparatus and developer container, developing device, process unit, and replaceable unit thereforTSURITANI SHOH·Filed 2013·Granted Sep 22, 2015·3 cites·13 claims
- 3481US8260186B2Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusableKUBOTA TOMOHIRO·Filed 2008·Granted Sep 4, 2012·6 cites·8 claims
- 3580US11800734B2Light-emitting device, electronic device, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2022·Granted Oct 24, 2023·0 cites·20 claims
- 3680US11506994B2Toner cartridge including a protrusion protruding from a center of a conveyance drive gearRICOH CO LTD·Filed 2021·Granted Nov 22, 2022·0 cites·7 claims
- 3780US10816914B2Developer container for image forming apparatusRICOH CO LTD·Filed 2019·Granted Oct 27, 2020·0 cites·30 claims
- 3880US9366996B2Sealing structure, developing device, cleaning device, process unit, and image forming apparatusHARADA AKINORI·Filed 2015·Granted Jun 14, 2016·2 cites·22 claims
- 3980US7706724B2Charging-roller bearing member, process cartridge, and image forming apparatusRICOH KK·Filed 2007·Granted Apr 27, 2010·6 cites·14 claims
- 4079US7623821B2Conveyor device, process cartridge, image forming apparatus, and method of forming imageRICOH KK·Filed 2007·Granted Nov 24, 2009·5 cites·14 claims
- 4178US10558145B2Downsized developer container with higher degree of freedomRICOH CO LTD·Filed 2019·Granted Feb 11, 2020·0 cites·30 claims
- 4277US8774683B2Development device, developer container, and image forming apparatusKUBOTA TOMOHIRO·Filed 2012·Granted Jul 8, 2014·2 cites·22 claims
- 4377US2025115544A1Arylamine compound, hole-transport layer material, hole-injection layer material, light-emitting device, light-emitting apparatus, electronic apparatus, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2024·Application pending·0 cites
- 4476US11231663B2Toner cartridge including a protrusion protruding from a center of a conveyance drive gearRICOH CO LTD·Filed 2020·Granted Jan 25, 2022·0 cites·15 claims
- 4576US10636976B2Organic compound, light-emitting element, light-emitting device, electronic device, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2017·Granted Apr 28, 2020·1 cites·40 claims
- 4676US10295933B2Developer container, developing device, process unit, and image forming apparatusKUBOTA TOMOHIRO·Filed 2018·Granted May 21, 2019·0 cites·7 claims
- 4776US9042745B2Developer amount detector, image forming apparatus incorporating same, and positioning structure for positioning unit within image forming apparatusYOSHIDA TOMOFUMI·Filed 2012·Granted May 26, 2015·2 cites·21 claims
- 4876US8811859B2Developer container, development device, process unit, and image forming apparatusTSURITANI SHOH·Filed 2012·Granted Aug 19, 2014·2 cites·9 claims
- 4975US11964928B2Organic compound, light-emitting device, light-emitting apparatus, electronic equipment, lighting device, and electronic deviceSEMICONDUCTOR ENERGY LAB·Filed 2019·Granted Apr 23, 2024·0 cites·22 claims
- 5075US11482687B2Light-emitting device, electronic device, and lighting deviceSEMICONDUCTOR ENERGY LAB·Filed 2020·Granted Oct 25, 2022·0 cites·37 claims
Showing the top 50 of 111 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →