Inventor · disambiguated record
Katsumi Okamoto
Also filed as: OKAMOTO KATSUMI
47 granted patents·8 pending applications·329 citations·filing 1996–2023
98Inventor score
Files withSEIKO EPSON CORP43OKAMOTO KATSUMI4FURUKAWA HIDEKAZU2IKAGAWA TAKAMASA1MITA INDUSTRIAL CO LTD1
Top patents by PatentIndex Score
55 records- 0196US7885554B2Developing device, image forming apparatus, image forming system, cartridge, developing unit and photoconductor unitSEIKO EPSON CORP·Filed 2005·Granted Feb 8, 2011·46 cites·91 claims
- 0294US8807739B2Recording apparatusOKAMOTO KATSUMI·Filed 2012·Granted Aug 19, 2014·10 cites·8 claims
- 0394US8596777B2Liquid ejecting apparatusOKAMOTO KATSUMI·Filed 2011·Granted Dec 3, 2013·11 cites·15 claims
- 0493US7565099B2Developing device and image forming apparatus having a toner-particle bearing roller with a helical groove portionSEIKO EPSON CORP·Filed 2006·Granted Jul 21, 2009·17 cites·16 claims
- 0593US7155151B2Developer carrier, developing device, image forming apparatus and computer systemSEIKO EPSON CORP·Filed 2003·Granted Dec 26, 2006·44 cites·11 claims
- 0692US7330681B2Developing device, image forming apparatus, and image forming systemSEIKO EPSON CORP·Filed 2005·Granted Feb 12, 2008·14 cites·38 claims
- 0791US9067419B2Recording apparatusSEIKO EPSON CORP·Filed 2014·Granted Jun 30, 2015·6 cites·8 claims
- 0889US7224924B2Developing device, image forming apparatus, image forming system, and method of manufacturing developing deviceSEIKO EPSON CORP·Filed 2005·Granted May 29, 2007·11 cites·24 claims
- 0988US9834001B2Recording apparatusSEIKO EPSON CORP·Filed 2015·Granted Dec 5, 2017·3 cites·9 claims
- 1088US7242872B2Image forming apparatus with changeover control for development cartridgesSEIKO EPSON CORP·Filed 2005·Granted Jul 10, 2007·10 cites·12 claims
- 1187US10737897B2Medium discharging device and method of controlling medium discharging deviceSEIKO EPSON CORP·Filed 2018·Granted Aug 11, 2020·4 cites·15 claims
- 1283US9150023B2Recording apparatusSEIKO EPSON CORP·Filed 2014·Granted Oct 6, 2015·3 cites·13 claims
- 1383US7359662B2Image forming apparatus with control blade having an arcuate shapeSEIKO EPSON CORP·Filed 2005·Granted Apr 15, 2008·7 cites·7 claims
- 1481US7783234B2Developer cartridge, image forming apparatus, and shutter deviceSEIKO EPSON CORP·Filed 2007·Granted Aug 24, 2010·6 cites·20 claims
- 1581US7330684B2Developing device, image forming apparatus, image forming system, charging member, and method for manufacturing developing deviceSEIKO EPSON CORP·Filed 2005·Granted Feb 12, 2008·6 cites·20 claims
- 1679US7636538B2Layer-thickness restriction member, developing device, method for manufacturing restriction blade, and blade-forming moldSEIKO EPSON CORP·Filed 2007·Granted Dec 22, 2009·5 cites·9 claims
- 1777US9085433B2Medium transport device and recording deviceSEIKO EPSON CORP·Filed 2014·Granted Jul 21, 2015·3 cites·7 claims
- 1877US7761037B2Image formation apparatus that replenishes developer based on detected height of developer and rotating speed of developer carrierSEIKO EPSON CORP·Filed 2008·Granted Jul 20, 2010·5 cites·7 claims
- 1976US6868247B2Developing unit, developing device, image-forming apparatus, and computer systemSEIKO EPSON CORP·Filed 2003·Granted Mar 15, 2005·15 cites·98 claims
- 2075US8851665B2Recording apparatusOKAMOTO KATSUMI·Filed 2012·Granted Oct 7, 2014·2 cites·4 claims
- 2175US7881644B2Developing device and image forming apparatusSEIKO EPSON CORP·Filed 2009·Granted Feb 1, 2011·4 cites·8 claims
- 2273US7539443B2Charging roller and image forming apparatusSEIKO EPSON CORP·Filed 2006·Granted May 26, 2009·3 cites·9 claims
- 2373US7406272B2Image forming apparatus and system with attachable and detachable developer containerSEIKO EPSON CORP·Filed 2005·Granted Jul 29, 2008·4 cites·11 claims
- 2472US7324775B2Image forming apparatus having developing device with sealing members and method of manufactureSEIKO EPSON CORP·Filed 2005·Granted Jan 29, 2008·4 cites·25 claims
- 2572US7257347B2Developer containing device, image forming apparatus, and image forming system with housing sections welded together by vibration weldingSEIKO EPSON CORP·Filed 2005·Granted Aug 14, 2007·4 cites·21 claims
- 2670US7076185B2Developing device, image forming apparatus, computer system, and seal-assisting memberSEIKO EPSON CORP·Filed 2004·Granted Jul 11, 2006·11 cites·8 claims
- 2769US12377669B2Relay transport device, feeding system, recording system, and position adjustment methodSEIKO EPSON CORP·Filed 2023·Granted Aug 5, 2025·0 cites·20 claims
- 2865US7403734B2Developing device, image forming apparatus, image forming system, and method of assembling developer supplying rollerSEIKO EPSON CORP·Filed 2006·Granted Jul 22, 2008·3 cites·12 claims
- 2965US6823156B2Developing device, rotary developing units, image formation apparatus and a computer system with a thickness regulator member and a roller support frameSEIKO EPSON CORP·Filed 2003·Granted Nov 23, 2004·9 cites·15 claims
- 3064US8807703B2Liquid ejection apparatusOKAMOTO KATSUMI·Filed 2012·Granted Aug 19, 2014·1 cites·5 claims
- 3163US9114943B2Medium transport device and recording deviceSEIKO EPSON CORP·Filed 2014·Granted Aug 25, 2015·1 cites·12 claims
- 3259USD500075SToner cartridgeSEIKO EPSON CORP·Filed 2003·Granted Dec 21, 2004·10 cites·1 claims
- 3357US8401443B2Toner-particle bearing roller, developing device, and image forming apparatusYAMADA YOICHI·Filed 2011·Granted Mar 19, 2013·0 cites·6 claims
- 3457US7881641B2Developing cartridge, developing device, and image forming apparatusSEIKO EPSON CORP·Filed 2009·Granted Feb 1, 2011·1 cites·16 claims
- 3557US6892039B2Connector having a built-in memory IC mounted on a development cartridgeSEIKO EPSON CORP·Filed 2003·Granted May 10, 2005·10 cites·12 claims
- 3655US5678777AFlour milling machineSATAKE ENG CO LTD·Filed 1996·Granted Oct 21, 1997·14 cites·4 claims
- 3752US2009208239A1Charging Roller and Image Forming ApparatusSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
- 3851US6937835B2Developer charging unit, developing device, image-forming apparatus, and computer systemSEIKO EPSON CORP·Filed 2003·Granted Aug 30, 2005·4 cites·53 claims
- 3949US7822368B2Container for developing agent, and image forming apparatus incorporating the sameSEIKO EPSON CORP·Filed 2009·Granted Oct 26, 2010·0 cites·15 claims
- 4045US7974549B2Developing device and image forming apparatusSEIKO EPSON CORP·Filed 2010·Granted Jul 5, 2011·0 cites·6 claims
- 4144US7620348B2Container for developing agent, and image forming apparatus incorporating the sameSEIKO EPSON CORP·Filed 2006·Granted Nov 17, 2009·0 cites·19 claims
- 4244US7190920B2Developing cartridge, air communication unit of developing cartridge and toner cartridgeSEIKO EPSON CORP·Filed 2003·Granted Mar 13, 2007·2 cites·22 claims
- 4343US7068961B2Developing device, image forming apparatus, image forming system, sealing member, and method for manufacturing sealing memberSEIKO EPSON CORP·Filed 2004·Granted Jun 27, 2006·2 cites·11 claims
- 4443US5729797AToner cartridgeMITA INDUSTRIAL CO LTD·Filed 1997·Granted Mar 17, 1998·10 cites·2 claims
- 4543US2009245878A1Development cartridge, development unit, and image forming apparatusSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
- 4643US2009245832A1Development cartridge, development unit, and image forming apparatusSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
- 4743US2008016933A1Molding method and molding apparatusYUTAKA GIKEN CO LTD·Filed 2007·Application pending·0 cites
- 4842US2009245863A1Developing device and image forming apparatus equipped with the developing deviceSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
- 4942US2009245885A1Developing device and image forming apparatusSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
- 5042US2009245823A1Developing device and image forming apparatusSEIKO EPSON CORP·Filed 2009·Application pending·0 cites
Showing the top 50 of 55 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →