Inventor · disambiguated record
Tadashi Horikawa
Also filed as: HORIKAWA TADASHI
48 granted patents·5 pending applications·1,289 citations·filing 1994–2025
98Inventor score
Top patents by PatentIndex Score
53 records- 0199US9213267B2Developing device frame unit, developing device, process cartridge, and manufacturing method of the developing device frame unitCANON KK·Filed 2014·Granted Dec 15, 2015·45 cites·28 claims
- 0299US7933534B2Developing device frame unit, developing device, process cartridge, and manufacturing method of the developing device frame unitCANON KK·Filed 2009·Granted Apr 26, 2011·88 cites·20 claims
- 0399US6681088B2Process cartridge, image forming apparatus and separating mechanism for separating developing member from photosensitive drumCANON KK·Filed 2002·Granted Jan 20, 2004·250 cites·20 claims
- 0499US6385416B1Space securing member, developing device, charging device and process cartridgeCANON KK·Filed 2000·Granted May 7, 2002·216 cites·13 claims
- 0598US11703794B2Cartridge and image forming apparatusCANON KK·Filed 2022·Granted Jul 18, 2023·4 cites·29 claims
- 0698US8682211B2Developing device frame unit, developing device, process cartridge, and manufacturing method of the developing device frame unitHOSHI NOBUHARU·Filed 2011·Granted Mar 25, 2014·75 cites·14 claims
- 0798US7386241B2Processing cartridge rotating a drum shaft in different directions and image forming apparatus mounting such a cartridgeCANON KK·Filed 2006·Granted Jun 10, 2008·42 cites·8 claims
- 0898US7366440B2Process cartridge feeding developer from first to second removed developer accommodating portions and image forming apparatus to which the cartridge is mountableCANON KK·Filed 2005·Granted Apr 29, 2008·41 cites·7 claims
- 0997US12072664B2Cartridge and image forming apparatusCANON KK·Filed 2023·Granted Aug 27, 2024·2 cites·30 claims
- 1097US10901366B2Image forming apparatus and cartridgeCANON KK·Filed 2020·Granted Jan 26, 2021·5 cites·7 claims
- 1197US9182733B2Developer supply cartridge, process cartridge and image forming apparatusCANON KK·Filed 2014·Granted Nov 10, 2015·32 cites·16 claims
- 1296US10678184B2Image forming apparatus and cartridgeCANON KK·Filed 2018·Granted Jun 9, 2020·11 cites·25 claims
- 1396US10627780B2Cartridge and image forming apparatusCANON KK·Filed 2019·Granted Apr 21, 2020·9 cites·10 claims
- 1496US8515306B2Cartridge and image forming apparatusKAWAI TACHIO·Filed 2009·Granted Aug 20, 2013·26 cites·21 claims
- 1596US8249485B2Process 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
- 1696US6587660B2Developing apparatusCANON KK·Filed 2001·Granted Jul 1, 2003·62 cites·8 claims
- 1795US11169483B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2018·Granted Nov 9, 2021·6 cites·39 claims
- 1894US11402798B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Aug 2, 2022·2 cites·26 claims
- 1994US11392081B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2021·Granted Jul 19, 2022·2 cites·40 claims
- 2094US6553189B2Optical guide, process cartridge, and electrophotographic image forming apparatusCANON KK·Filed 2001·Granted Apr 22, 2003·54 cites·14 claims
- 2192US10962927B2Cartridge and imaging forming apparatusCANON KK·Filed 2019·Granted Mar 30, 2021·5 cites·9 claims
- 2291US11720055B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2022·Granted Aug 8, 2023·1 cites·10 claims
- 2391US11449001B2Cartridge and image forming apparatusCANON KK·Filed 2021·Granted Sep 20, 2022·2 cites·6 claims
- 2486US2024295851A1Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 2585USD639335SProcess cartridgeCANON KK·Filed 2009·Granted Jun 7, 2011·30 cites·1 claims
- 2685USD638057SProcess cartridgeCANON KK·Filed 2009·Granted May 17, 2011·30 cites·1 claims
- 2784US12019392B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2023·Granted Jun 25, 2024·0 cites·29 claims
- 2884USD639846SProcess cartridgeCANON KK·Filed 2009·Granted Jun 14, 2011·28 cites·1 claims
- 2984US6195515B1Developing apparatus including a seal member sandwiched between a developer bearing member and a leakage preventing memberCANON KK·Filed 1999·Granted Feb 27, 2001·35 cites·18 claims
- 3083US11803153B2Process cartridge and electrophotographic image forming apparatusCANON KK·Filed 2023·Granted Oct 31, 2023·0 cites·30 claims
- 3183US9280136B2Photosensitive cartridge having locking member, developing cartridge attachable to photosensitive cartridge having locking member, process cartridge having locking member, and image forming apparatus having locking memberCANON KK·Filed 2015·Granted Mar 8, 2016·2 cites·20 claims
- 3283US6144820ADeveloping apparatus with a sealing member having an insulating layer and a conductive portionCANON KK·Filed 1999·Granted Nov 7, 2000·32 cites·22 claims
- 3378USD638056SProcess cartridgeCANON KK·Filed 2009·Granted May 17, 2011·22 cites·1 claims
- 3476US2025147461A1Cartridge and image forming apparatusCANON KK·Filed 2025·Application pending·0 cites
- 3570US12429811B2Cartridge and image forming apparatusCANON KK·Filed 2020·Granted Sep 30, 2025·0 cites·105 claims
- 3670US9389578B2Image-forming apparatusCANON KK·Filed 2015·Granted Jul 12, 2016·1 cites·20 claims
- 3769US6549735B2Developing apparatus with longitudinal end leakage preventing member in contact with smooth surface part of a developer carrying memberCANON KK·Filed 1999·Granted Apr 15, 2003·19 cites·9 claims
- 3868USD599846SProcess cartridgeCANON KK·Filed 2008·Granted Sep 8, 2009·15 cites·1 claims
- 3964US9946195B2Developer container developing device process cartridge and image forming apparatusCANON KK·Filed 2017·Granted Apr 17, 2018·0 cites·20 claims
- 4063US2008110206A1Optical element molding method and apparatusNIKON CORP·Filed 2007·Application pending·0 cites
- 4162US7979009B2Developer supplying cartridge including a developer supplying port shutter portion and electrophotographic image forming apparatus using the cartridgeCANON KK·Filed 2008·Granted Jul 12, 2011·2 cites·9 claims
- 4261US9846386B2Developer container, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2016·Granted Dec 19, 2017·0 cites·22 claims
- 4359USD873341SProcess cartridge for image forming apparatusCANON KK·Filed 2018·Granted Jan 21, 2020·7 cites·1 claims
- 4459USD474497SImage forming apparatusCANON KK·Filed 2002·Granted May 13, 2003·10 cites·1 claims
- 4558USD599847SToner cartridgeCANON KK·Filed 2008·Granted Sep 8, 2009·10 cites·1 claims
- 4658US2006081005A1Optical element molding method and apparatusNIKON CORP·Filed 2005·Application pending·0 cites
- 4755US10564597B2Method for manufacturing image bearing unit and method for manufacturing cartridgeCANON KK·Filed 2019·Granted Feb 18, 2020·0 cites·10 claims
- 4854USD474232SImage forming apparatusCANON KK·Filed 2002·Granted May 6, 2003·8 cites·1 claims
- 4950US10520883B2Method for manufacturing image bearing unit and method for manufacturing cartridgeCANON KK·Filed 2019·Granted Dec 31, 2019·0 cites·16 claims
- 5048US10649394B2Method of manufacturing frame unit, method of manufacturing image carrying unit, method of manufacturing cartridge, and cartridgeCANON KK·Filed 2019·Granted May 12, 2020·0 cites·26 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →