Inventor · disambiguated record
Takumi Furukawa
Also filed as: FURUKAWA TAKUMI
34 granted patents·15 pending applications·485 citations·filing 2005–2024
97Inventor score
Top patents by PatentIndex Score
49 records- 0198US11112748B2Developing member, process cartridge and electrophotographic apparatusCANON KK·Filed 2020·Granted Sep 7, 2021·9 cites·10 claims
- 0298US10845724B2Electro-conductive member, process cartridge and image forming apparatusCANON KK·Filed 2020·Granted Nov 24, 2020·11 cites·20 claims
- 0398US10416588B2Charging member, process cartridge, electrophotographic image forming apparatus, and method for manufacturing charging memberCANON KK·Filed 2017·Granted Sep 17, 2019·29 cites·11 claims
- 0497US11586121B2Electrophotographic electro-conductive member, process cartridge, and electrophotographic image forming deviceCANON KK·Filed 2022·Granted Feb 21, 2023·4 cites·16 claims
- 0597US11385559B2Electroconductive member, process cartridge, and image forming apparatusCANON KK·Filed 2020·Granted Jul 12, 2022·3 cites·14 claims
- 0697US11307509B2Electro-conductive member, method for producing same, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2020·Granted Apr 19, 2022·8 cites·8 claims
- 0797US11175602B2Electroconductive member, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2020·Granted Nov 16, 2021·10 cites·14 claims
- 0897US11169454B2Electrophotographic electro-conductive member, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2020·Granted Nov 9, 2021·11 cites·16 claims
- 0997US10545453B2Process cartridge and electrophotographic apparatusCANON KK·Filed 2018·Granted Jan 28, 2020·26 cites·10 claims
- 1097US8991053B2Charging member, process for its production, and electrophotographic apparatusCANON KK·Filed 2013·Granted Mar 31, 2015·29 cites·8 claims
- 1197US8685601B2Electrophotographic member, method for producing the same, process cartridge and electrophotographic apparatusCANON KK·Filed 2013·Granted Apr 1, 2014·23 cites·6 claims
- 1297US8622881B1Conductive member, electrophotographic apparatus, and process cartridgeCANON KK·Filed 2013·Granted Jan 7, 2014·25 cites·7 claims
- 1397US7962068B2Charging member, process cartridge and electrophotographic apparatusCANON KK·Filed 2005·Granted Jun 14, 2011·48 cites·10 claims
- 1497US7693457B2Charging member, process cartridge, and electrophotographic apparatusCANON KK·Filed 2005·Granted Apr 6, 2010·43 cites·14 claims
- 1596US11619890B2Electro-conductive member, manufacturing method thereof, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2022·Granted Apr 4, 2023·3 cites·7 claims
- 1696US10663913B2Process cartridge and electrophotographic apparatusCANON KK·Filed 2018·Granted May 26, 2020·19 cites·14 claims
- 1796US10558136B2Charging member, manufacturing method of charging member, electrophotographic apparatus, and process cartridgeCANON KK·Filed 2019·Granted Feb 11, 2020·16 cites·8 claims
- 1896US10146149B2Charging member, electrophotographic process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2018·Granted Dec 4, 2018·19 cites·6 claims
- 1996US9910379B2Charging member with concave portions containing insulating particles and electrophotographic apparatusCANON KK·Filed 2016·Granted Mar 6, 2018·20 cites·5 claims
- 2096US9904199B2Charging member having outer surface with concave portions bearing exposed elastic particles, and electrophotographic apparatusCANON KK·Filed 2016·Granted Feb 27, 2018·21 cites·5 claims
- 2195US11640122B2Electroconductive member, process cartridge, and image forming apparatusCANON KK·Filed 2022·Granted May 2, 2023·3 cites·18 claims
- 2295US10317811B2Charging member, method for producing same, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2017·Granted Jun 11, 2019·14 cites·2 claims
- 2395US7835669B2Charging roller, process cartridge and electrophotographic apparatusCANON KK·Filed 2010·Granted Nov 16, 2010·15 cites·3 claims
- 2494US11397388B2Process for producing an electrophotographic electroconductive memberCANON KK·Filed 2021·Granted Jul 26, 2022·3 cites·17 claims
- 2594US9360833B2Charging member, process cartridge and electrophotographic apparatusCANON KK·Filed 2013·Granted Jun 7, 2016·22 cites·5 claims
- 2693US11971683B2Electrophotographic electro-conductive member, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Apr 30, 2024·2 cites·12 claims
- 2793US7664434B2Charging member, process cartridge and electrophotographic apparatusCANON KK·Filed 2005·Granted Feb 16, 2010·18 cites·17 claims
- 2892US8445113B2Electro-conductive member for electrophotography, electrophotographic apparatus, and process cartridgeFURUKAWA TAKUMI·Filed 2012·Granted May 21, 2013·25 cites·4 claims
- 2988US8781369B2Charging roller and process for its productionCANON KK·Filed 2013·Granted Jul 15, 2014·4 cites·14 claims
- 3073US8980423B2Charging member, process for its production, process cartridgeTANIGUCHI TOMOHITO·Filed 2010·Granted Mar 17, 2015·2 cites·5 claims
- 3171US2024343573A1Gas treatment apparatus and gas treatment methodCANON KK·Filed 2024·Application pending·0 cites
- 3270US2024157006A1Active oxygen supply device and method for treatment with active oxygenCANON KK·Filed 2024·Application pending·0 cites
- 3367US2024350689A1Active oxygen supply device, device for performing treatment with active oxygen, and method for performing treatment with active oxygenCANON KK·Filed 2024·Application pending·0 cites
- 3466US2024157011A1Device for treatment with activated oxygen and method for treatment with activated oxygenCANON KK·Filed 2024·Application pending·0 cites
- 3565US2023226235A1Active oxygen supply apparatusCANON KK·Filed 2023·Application pending·0 cites
- 3661US10060028B2Charging member, manufacturing method therefor, a process cartridge, and electrophotographic apparatusCANON KK·Filed 2016·Granted Aug 28, 2018·0 cites·5 claims
- 3759US2024342679A1Active oxygen supply device, device for conducting treatment with active oxygen, and method for conducting treatment with active oxygenCANON KK·Filed 2024·Application pending·0 cites
- 3859US2024343574A1Reactive oxygen supply apparatus, treatment apparatus using reactive oxygen, and treatment method using reactive oxygenCANON KK·Filed 2024·Application pending·0 cites
- 3959US2024343570A1Reactive oxygen supply apparatus, treatment apparatus using reactive oxygen, and treatment method using reactive oxygenCANON KK·Filed 2024·Application pending·0 cites
- 4058US12259674B2Electroconductive member, process cartridge, and electrophotographic image formation deviceCANON KK·Filed 2022·Granted Mar 25, 2025·0 cites·21 claims
- 4158US2024343571A1Active oxygen supply deviceCANON KK·Filed 2024·Application pending·0 cites
- 4258US2024349416A1Device for treatment with activated oxyegen and method for treatment with activated oxygenCANON KK·Filed 2024·Application pending·0 cites
- 4358US2024343572A1Treatment apparatus using reactive oxygen and treatment method using reactive oxygenCANON KK·Filed 2024·Application pending·0 cites
- 4458US2024342337A1Gas treatment device and gas treatment methodCANON KK·Filed 2024·Application pending·0 cites
- 4553US2014128233A1Charging member, manufacturing method therefor, a process cartridge, and electrophotographic apparatusFURUKAWA TAKUMI·Filed 2012·Application pending·0 cites
- 4652US2023139536A1Sterilization device, sterilization method, active oxygen supply device, and device for treatment with active oxygenCANON KK·Filed 2022·Application pending·0 cites
- 4752US2023146111A1Active oxygen supply device, device for conducting treatment by active oxygen, and method for conducting treatment by active oxygenCANON KK·Filed 2022·Application pending·0 cites
- 4850US11378910B2Process cartridge and image forming apparatusCANON KK·Filed 2020·Granted Jul 5, 2022·0 cites·13 claims
- 4948US10401779B2Image forming apparatusCANON KK·Filed 2018·Granted Sep 3, 2019·0 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →