Inventor · disambiguated record
Tomoyuki Ichikawa
Also filed as: HOSOKAWA TAKESHI · ICHIKAWA TOMOYUKI
144 granted patents·20 pending applications·1,953 citations·filing 1982–2024
99Inventor score
Top patents by PatentIndex Score
164 records- 0199US7374851B2Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming methodRICOH KK·Filed 2006·Granted May 20, 2008·67 cites·25 claims
- 0299US7318989B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2006·Granted Jan 15, 2008·71 cites·14 claims
- 0399US6628908B2Toner supply unit and image forming apparatusRICOH KK·Filed 2001·Granted Sep 30, 2003·175 cites·19 claims
- 0498US7455942B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method using the sameRICOH KK·Filed 2005·Granted Nov 25, 2008·41 cites·19 claims
- 0598US7261989B2Toner for developing electrostatic images, developer, image forming method, and image forming apparatusRICOH KK·Filed 2006·Granted Aug 28, 2007·49 cites·16 claims
- 0698US7258959B2Toner for electrophotography and image forming apparatusRICOH KK·Filed 2005·Granted Aug 21, 2007·42 cites·34 claims
- 0798US7130558B2Toner supply unit and image forming apparatusRICOH KK·Filed 2005·Granted Oct 31, 2006·32 cites·62 claims
- 0898US6542707B2Method and apparatus for image forming capable of effectively transferring various kinds of powderRICOH KK·Filed 2001·Granted Apr 1, 2003·101 cites·71 claims
- 0998US6526246B2Powder replenishing device, powder conveying device, developing apparatus using the same powder replenishing device or powder conveying device, and image forming apparatus using the same powder replenishing device or powder conveying deviceRICOH KK·Filed 2001·Granted Feb 25, 2003·104 cites·68 claims
- 1097US7169525B2Toner, developer, image forming apparatus, process cartridge and image forming processRICOH KK·Filed 2005·Granted Jan 30, 2007·37 cites·26 claims
- 1197US6628913B2Method and apparatus for replenishing developer with a flexible powder containerRICOH KK·Filed 2001·Granted Sep 30, 2003·87 cites·131 claims
- 1296US7521164B2Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming methodRICOH KK·Filed 2008·Granted Apr 21, 2009·22 cites·7 claims
- 1396US7166403B2Toner, developer, image developing apparatus, and image forming apparatusRICOH KK·Filed 2005·Granted Jan 23, 2007·29 cites·21 claims
- 1495US7056636B2Dry toner, and process cartridge, image forming process and apparatus using the sameRICOH KK·Filed 2003·Granted Jun 6, 2006·58 cites·25 claims
- 1595US6879235B2TransformerKOITO MFG CO LTD·Filed 2003·Granted Apr 12, 2005·61 cites·7 claims
- 1694US7783233B2Developing device including improved conveying device, process cartridge and image forming apparatus using the sameRICOH KK·Filed 2007·Granted Aug 24, 2010·18 cites·15 claims
- 1794US7759036B2Toner and production method thereof, image forming apparatus and image forming method, and process cartridgeRICOH KK·Filed 2005·Granted Jul 20, 2010·17 cites·28 claims
- 1894US7368213B2Toner and fixing device and image forming device using the sameRICOH KK·Filed 2005·Granted May 6, 2008·17 cites·19 claims
- 1993US11653434B2Lighting circuit of automotive lampKOITO MFG CO LTD·Filed 2021·Granted May 16, 2023·3 cites·4 claims
- 2093US7835653B2Developing device and image forming apparatusRICOH CO LTD·Filed 2007·Granted Nov 16, 2010·13 cites·13 claims
- 2193US7157201B2Toner for developing latent electrostatic image, container having the same, developer using the same, process for developing using the same, image-forming process using the same, image-forming apparatus using the same, and image-forming process cartridge using the sameRICOH KK·Filed 2003·Granted Jan 2, 2007·34 cites·26 claims
- 2293US6597883B2Powder pump capable of effectively conveying powder and image forming apparatus using powder pumpRICOH KK·Filed 2002·Granted Jul 22, 2003·112 cites·60 claims
- 2392US10710495B2Automotive lampKOITO MFG CO LTD·Filed 2018·Granted Jul 14, 2020·3 cites·6 claims
- 2492US10420196B2Lighting circuit and vehicle lamp having the sameKOITO MFG CO LTD·Filed 2018·Granted Sep 17, 2019·7 cites·12 claims
- 2592US7729642B2Stress-reduceable transport unit and image forming apparatus using the sameRICOH KK·Filed 2006·Granted Jun 1, 2010·14 cites·20 claims
- 2692US7356290B2Toner supply unit and image forming apparatusRICOH KK·Filed 2006·Granted Apr 8, 2008·9 cites·34 claims
- 2792US7157199B2Toner, developer including the toner, container containing the toner or the developer and method of producing the tonerRICOH KK·Filed 2003·Granted Jan 2, 2007·32 cites·17 claims
- 2891US7828125B2System for controlling electric deviceHONDA MOTOR CO LTD·Filed 2007·Granted Nov 9, 2010·33 cites·13 claims
- 2991US7792472B2Developing apparatus and image forming apparatus using sameRICOH KK·Filed 2007·Granted Sep 7, 2010·10 cites·8 claims
- 3091US7566521B2Toner, developer, toner container, process cartridge, image forming apparatus, and image forming methodRICOH KK·Filed 2007·Granted Jul 28, 2009·11 cites·16 claims
- 3191US7172844B2Toner 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
- 3290US7542697B2Toner supply unit and image forming apparatusRICOH KK·Filed 2008·Granted Jun 2, 2009·7 cites·20 claims
- 3390US6947692B2Image forming method and apparatusRICOH KK·Filed 2003·Granted Sep 20, 2005·34 cites·18 claims
- 3490USD363082STape printerKING JIM CO LTD·Filed 1994·Granted Oct 10, 1995·34 cites·1 claims
- 3589US11612034B2Automotive lampKOITO MFG CO LTD·Filed 2020·Granted Mar 21, 2023·2 cites·13 claims
- 3689US7636536B2Image forming apparatus having an improved developer conveying systemRICOH KK·Filed 2006·Granted Dec 22, 2009·10 cites·15 claims
- 3789US7209689B2Toner supply unit and image forming apparatusRICOH KK·Filed 2003·Granted Apr 24, 2007·20 cites·111 claims
- 3887US6392364B1High voltage discharge lamp apparatus for vehiclesDENSO CORP·Filed 2000·Granted May 21, 2002·59 cites·45 claims
- 3986US10510997B2Film-covered batteryENVISION AESC ENERGY DEVICES LTD·Filed 2017·Granted Dec 17, 2019·2 cites·19 claims
- 4086US9840186B2Vehicle lampKOITO MFG CO LTD·Filed 2016·Granted Dec 12, 2017·5 cites·10 claims
- 4186US7291990B2Discharge lamp lighting circuitKOITO MFG CO LTD·Filed 2006·Granted Nov 6, 2007·13 cites·10 claims
- 4285US11558943B2Lighting circuit of automotive lampKOITO MFG CO LTD·Filed 2021·Granted Jan 17, 2023·1 cites·14 claims
- 4385US10383193B2Lighting circuit and vehicle lamp employing sameKOITO MFG CO LTD·Filed 2018·Granted Aug 13, 2019·3 cites·6 claims
- 4485US9907151B2Lighting circuit and vehicle lamp having the sameKOITO MFG CO LTD·Filed 2015·Granted Feb 27, 2018·4 cites·16 claims
- 4585US7368212B2Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of tonerRICOH KK·Filed 2004·Granted May 6, 2008·23 cites·18 claims
- 4684US7912408B2Image forming apparatus, process cartridge, and development deviceRICOH CO LTD·Filed 2008·Granted Mar 22, 2011·7 cites·20 claims
- 4784US7323281B2Toner, developer including the toner, container containing the toner or the developer and method of producing the tonerRICOH KK·Filed 2006·Granted Jan 29, 2008·6 cites·17 claims
- 4883US11652953B2Video signal processing device, video freeze detection circuit and video freeze detection methodLAPIS SEMICONDUCTOR CO LTD·Filed 2021·Granted May 16, 2023·1 cites·8 claims
- 4983US10641454B2Vehicle lamp that projects scanning beam scanned by optical scanning system to form first pattern, and that projects emission beam of second light source section to form second patternKOITO MFG CO LTD·Filed 2018·Granted May 5, 2020·4 cites·9 claims
- 5083US10391936B2Vehicular lighting deviceKOITO MFG CO LTD·Filed 2019·Granted Aug 27, 2019·2 cites·6 claims
Showing the top 50 of 164 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →