Inventor · disambiguated record
Hiroyuki Fujikawa
Also filed as: FUJIKAWA HIROYUKI
67 granted patents·25 pending applications·2,316 citations·filing 1975–2024
99Inventor score
Top patents by PatentIndex Score
92 records- 0199US9651883B2TonerCANON KK·Filed 2016·Granted May 16, 2017·41 cites·5 claims
- 0299US9348253B2Image-forming methodCANON KK·Filed 2015·Granted May 24, 2016·45 cites·5 claims
- 0399US9152088B1Developer replenishing cartridge and developer replenishing methodCANON KK·Filed 2014·Granted Oct 6, 2015·57 cites·12 claims
- 0498US10564560B2TonerCANON KK·Filed 2018·Granted Feb 18, 2020·25 cites·8 claims
- 0598US10474049B2TonerCANON KK·Filed 2019·Granted Nov 12, 2019·32 cites·7 claims
- 0698US10423086B2TonerCANON KK·Filed 2018·Granted Sep 24, 2019·22 cites·4 claims
- 0798US10274851B2TonerCANON KK·Filed 2018·Granted Apr 30, 2019·27 cites·13 claims
- 0898US10197936B2TonerCANON KK·Filed 2017·Granted Feb 5, 2019·39 cites·5 claims
- 0998US10175595B2TonerCANON KK·Filed 2017·Granted Jan 8, 2019·41 cites·7 claims
- 1098US10146146B2Toner and method of producing tonerCANON KK·Filed 2017·Granted Dec 4, 2018·38 cites·7 claims
- 1198US10088773B2Developer supply kit, developer supplying device and image forming apparatusCANON KK·Filed 2017·Granted Oct 2, 2018·27 cites·4 claims
- 1298US10082743B2TonerCANON KK·Filed 2016·Granted Sep 25, 2018·35 cites·3 claims
- 1398US10036970B2Magenta tonerCANON KK·Filed 2017·Granted Jul 31, 2018·36 cites·8 claims
- 1498US9720349B2Developer supply kit, developer supplying device and image forming apparatusCANON KK·Filed 2015·Granted Aug 1, 2017·28 cites·4 claims
- 1598US9665026B2Toner and two-component developerCANON KK·Filed 2016·Granted May 30, 2017·39 cites·6 claims
- 1698US9594323B2TonerFUJIKAWA HIROYUKI·Filed 2016·Granted Mar 14, 2017·52 cites·7 claims
- 1798US9436112B2Toner and two-component developerCANON KK·Filed 2014·Granted Sep 6, 2016·36 cites·5 claims
- 1898US9417540B2Toner and two-component developerCANON KK·Filed 2014·Granted Aug 16, 2016·49 cites·6 claims
- 1998US8986914B2TonerFUJIKAWA HIROYUKI·Filed 2011·Granted Mar 24, 2015·75 cites·5 claims
- 2098US8288069B2Toner and two-component developerFUJIKAWA HIROYUKI·Filed 2010·Granted Oct 16, 2012·63 cites·3 claims
- 2198US7939233B2Magnetic carrier and two-component developerCANON KK·Filed 2010·Granted May 10, 2011·58 cites·6 claims
- 2298US7927775B2Magnetic carrier and two component developerCANON KK·Filed 2010·Granted Apr 19, 2011·58 cites·5 claims
- 2398US7858283B2Magnetic carrier and two-component developerCANON KK·Filed 2010·Granted Dec 28, 2010·57 cites·11 claims
- 2498US7396626B2TonerCANON KK·Filed 2005·Granted Jul 8, 2008·55 cites·6 claims
- 2598US7396629B2Image forming method and image forming apparatusCANON KK·Filed 2005·Granted Jul 8, 2008·53 cites·12 claims
- 2697US10599060B2TonerCANON KK·Filed 2018·Granted Mar 24, 2020·21 cites·6 claims
- 2797US10451986B2TonerCANON KK·Filed 2018·Granted Oct 22, 2019·32 cites·4 claims
- 2897US10401748B2TonerCANON KK·Filed 2017·Granted Sep 3, 2019·35 cites·4 claims
- 2997US9256148B2TonerFUJIKAWA HIROYUKI·Filed 2011·Granted Feb 9, 2016·34 cites·5 claims
- 3097US9034549B2TonerSHIOTARI YOSHIAKI·Filed 2011·Granted May 19, 2015·65 cites·5 claims
- 3197US8142972B2Developer for replenishment and image forming methodHOTTA YOJIRO·Filed 2006·Granted Mar 27, 2012·53 cites·6 claims
- 3297US8137886B2Magnetic carrier, two-component developer and image forming methodBABA YOSHINOBU·Filed 2010·Granted Mar 20, 2012·61 cites·11 claims
- 3397US7442478B2Toner and method for forming imageCANON KK·Filed 2007·Granted Oct 28, 2008·34 cites·5 claims
- 3497US6203959B1TonerCANON KK·Filed 2000·Granted Mar 20, 2001·80 cites·16 claims
- 3596US11131939B2TonerCANON KK·Filed 2019·Granted Sep 28, 2021·14 cites·9 claims
- 3696US10955765B2Magnetic carrier and two-component developerCANON KK·Filed 2019·Granted Mar 23, 2021·10 cites·10 claims
- 3796US10935902B2TonerCANON KK·Filed 2019·Granted Mar 2, 2021·10 cites·10 claims
- 3896US7147980B2Toner and image forming apparatusCANON KK·Filed 2004·Granted Dec 12, 2006·69 cites·10 claims
- 3996US5968701AToner and image forming methodCANON KK·Filed 1998·Granted Oct 19, 1999·79 cites·55 claims
- 4095US7288348B2Color tonerCANON KK·Filed 2004·Granted Oct 30, 2007·60 cites·13 claims
- 4195US7279262B2Magnetic carrier and two-component developerCANON KK·Filed 2004·Granted Oct 9, 2007·60 cites·21 claims
- 4295US6670087B2Toner, image-forming apparatus, process cartridge and image forming methodCANON KK·Filed 2001·Granted Dec 30, 2003·59 cites·44 claims
- 4394US6235441B1Positively chargeable toner, image forming method and image forming apparatusCANON KK·Filed 1999·Granted May 22, 2001·67 cites·87 claims
- 4494US6156471AToner and image forming methodCANON KK·Filed 2000·Granted Dec 5, 2000·51 cites·35 claims
- 4593US7147981B2TonerCANON KK·Filed 2004·Granted Dec 12, 2006·41 cites·10 claims
- 4691US7297455B2Toner, and image forming methodCANON KK·Filed 2004·Granted Nov 20, 2007·40 cites·15 claims
- 4790US7272348B2Developing method using a developer with a specified degree of compression and shearing stressCANON KK·Filed 2005·Granted Sep 18, 2007·12 cites·7 claims
- 4890US6653036B1Magnetic toner and image forming methodCANON KK·Filed 1998·Granted Nov 25, 2003·49 cites·34 claims
- 4988US8455167B2Toner, binary developer, and image forming methodSHIOTARI YOSHIAKI·Filed 2010·Granted Jun 4, 2013·5 cites·7 claims
- 5088US7452647B2Color tonerCANON KK·Filed 2004·Granted Nov 18, 2008·28 cites·5 claims
Showing the top 50 of 92 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →