Inventor · disambiguated record
Ryuta Murakami
Also filed as: MURAKAMI RYUTA
55 granted patents·10 pending applications·1,118 citations·filing 2002–2025
99Inventor score
Top patents by PatentIndex Score
65 records- 0199US9188906B2Cartridge, developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Nov 17, 2015·50 cites·76 claims
- 0299US9164430B2Developer container, developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted Oct 20, 2015·48 cites·13 claims
- 0398US11703794B2Cartridge and image forming apparatusCANON KK·Filed 2022·Granted Jul 18, 2023·4 cites·29 claims
- 0498US9989892B2Developer accommodating container with projected shaped portion for contacting toner seal memberCANON KK·Filed 2016·Granted Jun 5, 2018·42 cites·16 claims
- 0598US9599932B2Developer container with sealing member having a plurality of holes and rotatable member having a plurality of projections contactable with the sealing memberCANON KK·Filed 2014·Granted Mar 21, 2017·43 cites·36 claims
- 0698US9523942B2Developer accommodating container, developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2016·Granted Dec 20, 2016·61 cites·16 claims
- 0798US9465318B2Developer accommodating container with toner seal member, unsealing member, and auxiliary unsealing memberCANON KK·Filed 2013·Granted Oct 11, 2016·63 cites·16 claims
- 0898US9229371B2Developer container, developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted Jan 5, 2016·41 cites·11 claims
- 0998US9116466B2Cartridge, process cartridge and image forming apparatusCANON KK·Filed 2013·Granted Aug 25, 2015·42 cites·18 claims
- 1098US9069289B2Developer container, developing cartridge, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted Jun 30, 2015·44 cites·19 claims
- 1198US9052638B2Cartridge and image forming apparatus with seal member for sealing a toner feeding openingCANON KK·Filed 2013·Granted Jun 9, 2015·43 cites·16 claims
- 1298US7024131B2Process cartridge assembling method, process cartridge remanufacturing method, and connecting memberCANON KK·Filed 2003·Granted Apr 4, 2006·121 cites·19 claims
- 1397US12072664B2Cartridge and image forming apparatusCANON KK·Filed 2023·Granted Aug 27, 2024·2 cites·30 claims
- 1497US11927910B2Cartridge and image forming apparatusCANON KK·Filed 2023·Granted Mar 12, 2024·3 cites·31 claims
- 1597US10901366B2Image forming apparatus and cartridgeCANON KK·Filed 2020·Granted Jan 26, 2021·5 cites·7 claims
- 1697US10095161B2Accommodating container, process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2017·Granted Oct 9, 2018·26 cites·36 claims
- 1796US10678184B2Image forming apparatus and cartridgeCANON KK·Filed 2018·Granted Jun 9, 2020·11 cites·25 claims
- 1896US10627780B2Cartridge and image forming apparatusCANON KK·Filed 2019·Granted Apr 21, 2020·9 cites·10 claims
- 1996US6735405B2Method of remanufacturing process cartridge and developing deviceCANON KK·Filed 2002·Granted May 11, 2004·76 cites·30 claims
- 2095US11169483B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2018·Granted Nov 9, 2021·6 cites·39 claims
- 2195US8620181B2Process cartridge and electrophotographic image forming apparatusMURAKAMI RYUTA·Filed 2011·Granted Dec 31, 2013·30 cites·21 claims
- 2295US6898392B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2002·Granted May 24, 2005·64 cites·15 claims
- 2395US6836639B2Cleaning apparatus having a cleaning member, a cleaning frame, and a connecting portion connecting both end surfaces of the frameCANON KK·Filed 2002·Granted Dec 28, 2004·58 cites·8 claims
- 2494US11402798B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Aug 2, 2022·2 cites·26 claims
- 2594US11392081B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Jul 19, 2022·2 cites·40 claims
- 2694US10788788B2Electrophotographic image forming apparatus having a driving-force transmission member featuring first and second helical gear portions with opposing twist directionsCANON KK·Filed 2019·Granted Sep 29, 2020·5 cites·21 claims
- 2794US7156797B2Assembling method for developing rollerCANON KK·Filed 2003·Granted Jan 2, 2007·49 cites·5 claims
- 2892US10962927B2Cartridge and imaging forming apparatusCANON KK·Filed 2019·Granted Mar 30, 2021·5 cites·9 claims
- 2991US11720055B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2022·Granted Aug 8, 2023·1 cites·10 claims
- 3091US11449001B2Cartridge and image forming apparatusCANON KK·Filed 2021·Granted Sep 20, 2022·2 cites·6 claims
- 3191US7206534B2Process cartridge, developing cartridge and gripping part thereforCANON KK·Filed 2004·Granted Apr 17, 2007·39 cites·6 claims
- 3290US10303116B2Electrophotographic image forming apparatus having a driving-force transmission member featuring first and second helical gear portions with opposing twist directionsCANON KK·Filed 2017·Granted May 28, 2019·3 cites·19 claims
- 3390US6987938B2Process cartridge and image forming apparatusCANON KK·Filed 2003·Granted Jan 17, 2006·34 cites·38 claims
- 3489US9904208B2Accommodating container, cleaning device, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2016·Granted Feb 27, 2018·3 cites·20 claims
- 3586US2024295851A1Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 3684US12019392B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2023·Granted Jun 25, 2024·0 cites·29 claims
- 3784US9823603B2Feeding device, cleaning device, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2016·Granted Nov 21, 2017·2 cites·25 claims
- 3883US11803153B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2023·Granted Oct 31, 2023·0 cites·30 claims
- 3982US12287600B2Drum unit, drive transmission unit, cartridge and electrophotographic image forming apparatusCANON KK·Filed 2023·Granted Apr 29, 2025·0 cites·15 claims
- 4081US7519311B2Developing apparatus, process cartridge, image forming apparatus, and assemblying method for developing apparatusCANON KK·Filed 2006·Granted Apr 14, 2009·6 cites·36 claims
- 4178US2025164918A1Drum unit, drive transmission unit, cartridge and electrophotographic image forming apparatusCANON KK·Filed 2025·Application pending·0 cites
- 4276US2025147461A1Cartridge and image forming apparatusCANON KK·Filed 2025·Application pending·0 cites
- 4375US12025941B2Drum unit, drive transmission unit, cartridge and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Jul 2, 2024·0 cites·33 claims
- 4475US10073380B2Feeding deviceCANON KK·Filed 2016·Granted Sep 11, 2018·1 cites·21 claims
- 4575US9618873B2Image forming apparatusCANON KK·Filed 2015·Granted Apr 11, 2017·1 cites·18 claims
- 4675USD622309SProcess cartridgeCANON KK·Filed 2008·Granted Aug 24, 2010·19 cites·1 claims
- 4774USD583860SToner cartridgeCANON KK·Filed 2007·Granted Dec 30, 2008·19 cites·1 claims
- 4874US2025199451A1Photosensitive member unit, cartridge and electrophotographic image forming apparatusCANON KK·Filed 2025·Application pending·0 cites
- 4970US12429811B2Cartridge and image forming apparatusCANON KK·Filed 2020·Granted Sep 30, 2025·0 cites·105 claims
- 5070US9389583B2Image forming apparatus and process cartridgeCANON KK·Filed 2015·Granted Jul 12, 2016·1 cites·15 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →