Inventor · disambiguated record
Tachio Kawai
Also filed as: KAWAI TACHIO
77 granted patents·13 pending applications·2,363 citations·filing 1997–2025
99Inventor score
Top patents by PatentIndex Score
90 records- 0199US7046942B2Process cartridge and image forming apparatusCANON KK·Filed 2005·Granted May 16, 2006·70 cites·4 claims
- 0299US6496667B2Cartridge detachably attachable to image forming apparatusCANON KK·Filed 2001·Granted Dec 17, 2002·142 cites·27 claims
- 0398US11822265B2Toner container and image forming systemCANON KK·Filed 2023·Granted Nov 21, 2023·6 cites·31 claims
- 0498US11662673B2Toner container having nozzle and projection at bottom of container and image forming system using containerCANON KK·Filed 2022·Granted May 30, 2023·7 cites·20 claims
- 0598US11592766B2Toner container and image forming systemCANON KK·Filed 2022·Granted Feb 28, 2023·10 cites·30 claims
- 0698US8879954B2Cartridge with member for fixing a member-to-be-energizedCANON KK·Filed 2012·Granted Nov 4, 2014·28 cites·10 claims
- 0798US7848684B2Process cartridge, developer supply cartridge and electrophotographic image forming apparatusCANON KK·Filed 2009·Granted Dec 7, 2010·29 cites·30 claims
- 0898US7555249B2Process cartridge, developer supply cartridge and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Jun 30, 2009·36 cites·43 claims
- 0998US7457569B2Process cartridge, developer supply cartridge and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Nov 25, 2008·32 cites·12 claims
- 1098US7233752B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2006·Granted Jun 19, 2007·44 cites·7 claims
- 1198US7016626B2Electrophotographic photosensitive drum having caulked flanges, process cartridge having such a drum, and image forming apparatus having such a process cartridgeCANON KK·Filed 2003·Granted Mar 21, 2006·109 cites·17 claims
- 1298US6968142B2Process cartridge and image forming apparatusCANON KK·Filed 2003·Granted Nov 22, 2005·89 cites·4 claims
- 1398US6947686B2Process cartridge and spacer for sameCANON KK·Filed 2003·Granted Sep 20, 2005·101 cites·20 claims
- 1498US6735403B2Image forming apparatus to which a developing cartridge or process cartridge are detachably mountable comprising driving control means for permitting and preventing transmission of a driving force to a winding memberCANON KK·Filed 2001·Granted May 11, 2004·114 cites·18 claims
- 1598US6560422B2Development cartridge, process cartridge, and electrophotographic image forming apparatus, and toner seal member for unsealing an opening for supplying developer by automatically winding up the toner seal memberCANON KK·Filed 2001·Granted May 6, 2003·121 cites·17 claims
- 1698US6381430B1Assembling and disassembling methods for developing cartridgeCANON KK·Filed 1999·Granted Apr 30, 2002·138 cites·16 claims
- 1798US6055406ACleaning frame, cleaning device, process cartridge and electrophotographic image forming apparatus with segregated waste toner containerCANON KK·Filed 1997·Granted Apr 25, 2000·127 cites·41 claims
- 1897US11927910B2Cartridge and image forming apparatusCANON KK·Filed 2023·Granted Mar 12, 2024·3 cites·31 claims
- 1997US11906927B2Cartridge, drum unit and image forming apparatusCANON KK·Filed 2022·Granted Feb 20, 2024·3 cites·24 claims
- 2097US9188940B2Developing device, process cartridge and drum unitCANON KK·Filed 2014·Granted Nov 17, 2015·20 cites·9 claims
- 2197US8909096B2Developing device, process cartridge and drum unitCANON KK·Filed 2012·Granted Dec 9, 2014·23 cites·28 claims
- 2297US8755713B2Manufacturing method of developing device, remanufacturing method of process cartridge, developing device, and process cartridgeKAWAI TACHIO·Filed 2012·Granted Jun 17, 2014·22 cites·18 claims
- 2397US8180262B2Process cartridge, developer supply cartridge and electrophotographic image forming apparatusKAWAI TACHIO·Filed 2011·Granted May 15, 2012·15 cites·9 claims
- 2497US7310489B2Process cartridge including first and second portions to be positioned and first and second portions to be supported and image forming apparatus detachably mounting such process cartridgeCANON KK·Filed 2005·Granted Dec 18, 2007·30 cites·26 claims
- 2597US7027754B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Apr 11, 2006·75 cites·39 claims
- 2696US8515306B2Cartridge and image forming apparatusKAWAI TACHIO·Filed 2009·Granted Aug 20, 2013·26 cites·21 claims
- 2796US8249485B2Process cartridge with portions to be supported and regulated during insertion of the cartridge into an electrophotographic image forming apparatusHORIKAWA TADASHI·Filed 2008·Granted Aug 21, 2012·48 cites·18 claims
- 2896US8045899B2Process cartridge, developer supply cartridge and electrophotographic image forming apparatusCANON KK·Filed 2010·Granted Oct 25, 2011·10 cites·1 claims
- 2996US7085516B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2003·Granted Aug 1, 2006·76 cites·20 claims
- 3096US6480687B1Process cartridge, handle attaching method and electrophotographic image forming apparatusCANON KK·Filed 2000·Granted Nov 12, 2002·65 cites·30 claims
- 3196US6463232B1Handle, process cartridge, handle attaching method and electrophotographic image forming apparatusCANON KK·Filed 2000·Granted Oct 8, 2002·66 cites·19 claims
- 3296US6061535ADeveloping cartridge, for a revolver type developing device, with sensing means for sensing the remaining tonerCANON KK·Filed 1998·Granted May 9, 2000·85 cites·28 claims
- 3395US7257353B2Developing apparatusCANON KK·Filed 2005·Granted Aug 14, 2007·23 cites·11 claims
- 3495US6738588B2Image forming apparatus and process cartridge detachably attachable to the sameCANON KK·Filed 2001·Granted May 18, 2004·53 cites·51 claims
- 3594US12140884B2Toner container and image forming systemCANON KK·Filed 2023·Granted Nov 12, 2024·1 cites·21 claims
- 3694US8494409B2Process cartridge and image forming apparatusKAWAI TACHIO·Filed 2011·Granted Jul 23, 2013·12 cites·18 claims
- 3794US6282395B1Developing device and process cartridgeCANON KK·Filed 1999·Granted Aug 28, 2001·62 cites·18 claims
- 3893US12038716B2Cartridge, drum unit and image forming apparatusCANON KK·Filed 2022·Granted Jul 16, 2024·1 cites·27 claims
- 3993US12032330B2Cartridge, drum unit and image forming apparatusCANON KK·Filed 2022·Granted Jul 9, 2024·1 cites·18 claims
- 4093US10915060B2Developing device having restricted movement, process cartridge and image forming apparatusCANON KK·Filed 2019·Granted Feb 9, 2021·5 cites·28 claims
- 4193US10509361B2Image forming apparatus and cartridge mountable on the sameCANON KK·Filed 2018·Granted Dec 17, 2019·7 cites·8 claims
- 4291US12169376B2Toner cartridge and image forming apparatusCANON KK·Filed 2023·Granted Dec 17, 2024·1 cites·37 claims
- 4390US2025315006A1Cartridge, drum unit and image forming apparatusCANON KK·Filed 2025·Application pending·0 cites
- 4488US6070027ADeveloping apparatus with auxiliary seal disposed outside of end sealCANON KK·Filed 1998·Granted May 30, 2000·41 cites·15 claims
- 4587US9280131B2Developer container, developing apparatus, cleaning apparatus, process cartridge, and image forming apparatusCANON KK·Filed 2014·Granted Mar 8, 2016·4 cites·18 claims
- 4686US6438347B2Developing device featuring a control member having a center portion width wider than end portions width in a longitudinal direction thereof for controlling developer thickness and method for using sameCANON KK·Filed 1999·Granted Aug 20, 2002·39 cites·18 claims
- 4786US6002898ADeveloping cartridge and image forming apparatusCANON KK·Filed 1998·Granted Dec 14, 1999·39 cites·12 claims
- 4886US5887227ADeveloping deviceCANON KK·Filed 1997·Granted Mar 23, 1999·38 cites·14 claims
- 4985US12449759B2Cartridge, drum unit and image forming apparatusCANON KK·Filed 2024·Granted Oct 21, 2025·0 cites·20 claims
- 5085USD639335SProcess cartridgeCANON KK·Filed 2009·Granted Jun 7, 2011·30 cites·1 claims
Showing the top 50 of 90 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →