Inventor · disambiguated record
Hirobumi Ooyoshi
Also filed as: OOYOSHI HIROBUMI
45 granted patents·1 pending application·324 citations·filing 2005–2016
98Inventor score
Technology areasG03G
Top patents by PatentIndex Score
46 records- 0197US8019254B2Toner conveying device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Sep 13, 2011·32 cites·11 claims
- 0295US8135329B2Toner conveyer device, process cartridge, and image forming apparatusSHIMIZU YOSHIYUKI·Filed 2007·Granted Mar 13, 2012·23 cites·16 claims
- 0395US7424263B2Toner recovery belt conveyor, process cartridge, and image forming apparatus using the sameRICOH KK·Filed 2006·Granted Sep 9, 2008·23 cites·13 claims
- 0492US8275285B2Process cartridge and image forming apparatusKAWAKAMI YOSHIHIRO·Filed 2008·Granted Sep 25, 2012·15 cites·11 claims
- 0592US7965957B2Developing device and image forming apparatus that uses this developing deviceRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·13 cites·12 claims
- 0692US7945203B2Waste-toner collecting device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2008·Granted May 17, 2011·13 cites·10 claims
- 0792US7890044B2Powder conveyance device, toner conveyance device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2007·Granted Feb 15, 2011·13 cites·13 claims
- 0891US8768203B2Image forming apparatus capable of effectively utilizing interior spaceHAMADA MANABU·Filed 2011·Granted Jul 1, 2014·12 cites·18 claims
- 0991US7979013B2Developing device of image forming apparatusRICOH CO LTD·Filed 2007·Granted Jul 12, 2011·13 cites·15 claims
- 1090US8160476B2Latent image carrier having pairs of first and second positioning protrusions and image forming apparatusSHIMIZU YOSHIYUKI·Filed 2008·Granted Apr 17, 2012·12 cites·20 claims
- 1190US7634213B2Toner collecting device, image forming unit and image forming apparatusRICOH KK·Filed 2006·Granted Dec 15, 2009·11 cites·7 claims
- 1286US8861991B2Developer amount detector, and developer container, development device, and image forming apparatus incorporating sameKUBOTA TOMOHIRO·Filed 2012·Granted Oct 14, 2014·4 cites·18 claims
- 1386US8682199B2Mechanism for electrifying, method of electrifying, and conductive memberTOYODA MINORU·Filed 2010·Granted Mar 25, 2014·4 cites·18 claims
- 1485US8442414B2Seal member, developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2011·Granted May 14, 2013·3 cites·23 claims
- 1584US7965958B2Developing device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·7 cites·14 claims
- 1684US7917077B2Waste-toner housing device, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 29, 2011·7 cites·14 claims
- 1784US7873302B2Cleaning device and image forming apparatusRICOH CO LTD·Filed 2007·Granted Jan 18, 2011·7 cites·17 claims
- 1884US7676184B2Developing apparatusRICOH KK·Filed 2007·Granted Mar 9, 2010·8 cites·12 claims
- 1982US8712277B2Rotating-body electrification mechanism, image carrier unit, process cartridge, image forming apparatus, and method for electrifying image carrier unitOOYOSHI HIROBUMI·Filed 2012·Granted Apr 29, 2014·3 cites·15 claims
- 2082US7502579B2Developing device using developer of particular properties suitable thereforeRICOH KK·Filed 2005·Granted Mar 10, 2009·7 cites·9 claims
- 2181US8260186B2Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusableKUBOTA TOMOHIRO·Filed 2008·Granted Sep 4, 2012·6 cites·8 claims
- 2280US8320792B2Cleaning device, process cartridge, and image forming apparatusKAWAKAMI YOSHIHIRO·Filed 2009·Granted Nov 27, 2012·6 cites·15 claims
- 2380US7706724B2Charging-roller bearing member, process cartridge, and image forming apparatusRICOH KK·Filed 2007·Granted Apr 27, 2010·6 cites·14 claims
- 2479US7623821B2Conveyor device, process cartridge, image forming apparatus, and method of forming imageRICOH KK·Filed 2007·Granted Nov 24, 2009·5 cites·14 claims
- 2576US8526849B2Process cartridge and image forming apparatusYOSHIDA TOMOFUMI·Filed 2010·Granted Sep 3, 2013·2 cites·9 claims
- 2675US8208832B2Toner-collecting device and image forming apparatusYOSHIDA TOMOFUMI·Filed 2008·Granted Jun 26, 2012·4 cites·18 claims
- 2775US8135313B2Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screwYOSHIDA TOMOFUMI·Filed 2008·Granted Mar 13, 2012·4 cites·17 claims
- 2874US8095035B2Developing device, process unit, and image forming apparatus, with supporting members, grooves, and supported developing rollerOOYOSHI HIROBUMI·Filed 2008·Granted Jan 10, 2012·4 cites·15 claims
- 2968US8019259B2Development device, process unit, and image forming apparatusRICOH CO LTD·Filed 2010·Granted Sep 13, 2011·1 cites·11 claims
- 3068USD597129SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Jul 28, 2009·15 cites·1 claims
- 3167US8913926B2Developer container, developing device, process cartridge, image forming device, and developer refilling methodNAKAMURA KENJI·Filed 2012·Granted Dec 16, 2014·1 cites·20 claims
- 3267US8326203B2Toner conveyance device, process unit, and image forming apparatusOOYOSHI HIROBUMI·Filed 2010·Granted Dec 4, 2012·1 cites·11 claims
- 3367US8081897B2Seal member, developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2008·Granted Dec 20, 2011·2 cites·20 claims
- 3460US9110396B2Mechanism for electrifying, method of electrifying, and conductive memberTOYODA MINORU·Filed 2014·Granted Aug 18, 2015·0 cites·18 claims
- 3557US8103195B2Toner agitating unit, toner hopper, process cartridge, and image forming apparatusYOSHIDA TOMOFUMI·Filed 2008·Granted Jan 24, 2012·1 cites·8 claims
- 3657USD590012SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Apr 7, 2009·10 cites·1 claims
- 3755USD580968SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Nov 18, 2008·9 cites·1 claims
- 3852US9268300B2Process unit including a rotatable shaft along a driving force vector and image forming apparatus including the sameSHIMIZU YOSHIYUKI·Filed 2013·Granted Feb 23, 2016·0 cites·17 claims
- 3951US8824951B2Toner conveyor, process cartridge, and image forming apparatusOOYOSHI HIROBUMI·Filed 2012·Granted Sep 2, 2014·0 cites·19 claims
- 4050US9612547B2Developing device, process cartridge, and image forming apparatusOOYOSHI HIROBUMI·Filed 2016·Granted Apr 4, 2017·0 cites·12 claims
- 4150USD590011SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Apr 7, 2009·7 cites·1 claims
- 4247USD603450SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Nov 3, 2009·6 cites·1 claims
- 4343USD750702SPowder containerOOYOSHI HIROBUMI·Filed 2014·Granted Mar 1, 2016·4 cites·1 claims
- 4441US7272355B2Cleaning device for image forming apparatusRICOH PRINTING SYS LTD·Filed 2005·Granted Sep 18, 2007·0 cites·11 claims
- 4540US7224915B2Image forming apparatus and image forming unitRICOH PRINTING SYS LTD·Filed 2006·Granted May 29, 2007·0 cites·7 claims
- 4640US2008145119A1Image forming apparatus and process cartridge used thereinTATSUMI KENZO·Filed 2007·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Hirobumi Ooyoshi files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →