Inventor · disambiguated record
Kenzo Tatsumi
Also filed as: TATSUMI KENZO
51 granted patents·2 pending applications·1,590 citations·filing 1994–2011
99Inventor score
Technology areasG03G
Top patents by PatentIndex Score
53 records- 0198US7577379B2Toner container, toner supply device and image forming apparatusRICOH KK·Filed 2007·Granted Aug 18, 2009·42 cites·9 claims
- 0298US7184691B2Toner container, toner supply device and image forming apparatusRICOH KK·Filed 2005·Granted Feb 27, 2007·81 cites·27 claims
- 0398US5828935AImage forming apparatus, toner supply unit, and toner bottle attached theretoRICOH KK·Filed 1996·Granted Oct 27, 1998·190 cites·24 claims
- 0497US8019254B2Toner conveying device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Sep 13, 2011·32 cites·11 claims
- 0597US7214461B2Toner for electrophotography, developer using the same, image-forming process cartridge using the same, image-forming apparatus using the same and image-forming process using the sameRICOH KK·Filed 2006·Granted May 8, 2007·27 cites·16 claims
- 0697US6266501B1Image-forming apparatus having a seal for a developer and a method for detecting a removal of the sealRICOH KK·Filed 2000·Granted Jul 24, 2001·90 cites·44 claims
- 0797US5765079AToner bottleRICOH KK·Filed 1996·Granted Jun 9, 1998·104 cites·27 claims
- 0897US5734953ADetachable toner supply and processing assembly for an image forming apparatus and having a shutter mechanism for toner flow controlRICOH KK·Filed 1996·Granted Mar 31, 1998·108 cites·50 claims
- 0996US7110710B2Toner for electrophotography, developer using the same, image-forming process cartridge using the same, image-forming apparatus using the same and image-forming process using the sameRICOH KK·Filed 2005·Granted Sep 19, 2006·19 cites·10 claims
- 1096US5887224AImage forming device with improved mixing of circulated developer with replensihed tonerRICOH KK·Filed 1997·Granted Mar 23, 1999·97 cites·21 claims
- 1195US8135329B2Toner conveyer device, process cartridge, and image forming apparatusSHIMIZU YOSHIYUKI·Filed 2007·Granted Mar 13, 2012·23 cites·16 claims
- 1295US7962069B2Toner container, image forming apparatus, method of recycling toner containerRICOH CO LTD·Filed 2005·Granted Jun 14, 2011·19 cites·56 claims
- 1395US7424263B2Toner recovery belt conveyor, process cartridge, and image forming apparatus using the sameRICOH KK·Filed 2006·Granted Sep 9, 2008·23 cites·13 claims
- 1495US6628903B1Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paperRICOH KK·Filed 2000·Granted Sep 30, 2003·52 cites·3 claims
- 1595US6144811AImage forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paperRICOH KK·Filed 1999·Granted Nov 7, 2000·70 cites·17 claims
- 1694US5532795AMethod of and system for cleaning roller membersRICOH KK·Filed 1994·Granted Jul 2, 1996·52 cites·54 claims
- 1793US6148161AImage forming apparatus with improved toner density controlRICOH KK·Filed 1999·Granted Nov 14, 2000·64 cites·25 claims
- 1893US6144822AImage forming apparatus having detachable transfer roller and discharge deviceRICOH KK·Filed 1999·Granted Nov 7, 2000·63 cites·22 claims
- 1993US6128449AImage forming apparatus and method for controlling charging and developing bias voltageRICOH KK·Filed 1998·Granted Oct 3, 2000·72 cites·12 claims
- 2092US8275285B2Process cartridge and image forming apparatusKAWAKAMI YOSHIHIRO·Filed 2008·Granted Sep 25, 2012·15 cites·11 claims
- 2192US7965957B2Developing device and image forming apparatus that uses this developing deviceRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·13 cites·12 claims
- 2292US7945203B2Waste-toner collecting device, process cartridge, and image forming apparatusRICOH CO LTD·Filed 2008·Granted May 17, 2011·13 cites·10 claims
- 2392US7890044B2Powder conveyance device, toner conveyance device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2007·Granted Feb 15, 2011·13 cites·13 claims
- 2492US6665511B2Developing device and image forming apparatus including the sameRICOH KK·Filed 2002·Granted Dec 16, 2003·38 cites·12 claims
- 2591US7979013B2Developing device of image forming apparatusRICOH CO LTD·Filed 2007·Granted Jul 12, 2011·13 cites·15 claims
- 2691US5915143AImage forming apparatus and method for automatically adjusting toner density in response to humidity variationsRICOH KK·Filed 1997·Granted Jun 22, 1999·55 cites·27 claims
- 2790US8160476B2Latent 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
- 2890US7634213B2Toner collecting device, image forming unit and image forming apparatusRICOH KK·Filed 2006·Granted Dec 15, 2009·11 cites·7 claims
- 2985US8442414B2Seal member, developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2011·Granted May 14, 2013·3 cites·23 claims
- 3085US6898383B2Image forming apparatusRICOH KK·Filed 2003·Granted May 24, 2005·19 cites·20 claims
- 3184US7965958B2Developing device, process cartridge and image forming apparatusRICOH CO LTD·Filed 2008·Granted Jun 21, 2011·7 cites·14 claims
- 3284US7917077B2Waste-toner housing device, and image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 29, 2011·7 cites·14 claims
- 3384US7873302B2Cleaning device and image forming apparatusRICOH CO LTD·Filed 2007·Granted Jan 18, 2011·7 cites·17 claims
- 3481US8260186B2Toner 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
- 3580US7706724B2Charging-roller bearing member, process cartridge, and image forming apparatusRICOH KK·Filed 2007·Granted Apr 27, 2010·6 cites·14 claims
- 3680USD406162SToner bottleRICOH CO LTD·Filed 1997·Granted Feb 23, 1999·22 cites·1 claims
- 3779US7623821B2Conveyor device, process cartridge, image forming apparatus, and method of forming imageRICOH KK·Filed 2007·Granted Nov 24, 2009·5 cites·14 claims
- 3879US7027761B2Developing device and an image forming apparatus including the sameRICOH KK·Filed 2004·Granted Apr 11, 2006·17 cites·21 claims
- 3977US6771918B2Developing device and image forming deviceRICOH KK·Filed 2002·Granted Aug 3, 2004·15 cites·21 claims
- 4075US8208832B2Toner-collecting device and image forming apparatusYOSHIDA TOMOFUMI·Filed 2008·Granted Jun 26, 2012·4 cites·18 claims
- 4175US8135313B2Powder 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
- 4274US8095035B2Developing 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
- 4368USD597129SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Jul 28, 2009·15 cites·1 claims
- 4467US8081897B2Seal member, developing device, process cartridge, and image forming apparatusKUBOTA TOMOHIRO·Filed 2008·Granted Dec 20, 2011·2 cites·20 claims
- 4565US8068770B2Toner cartridge, image forming apparatus, method of recycling toner cartridgeKURENUMA TAKEROH·Filed 2010·Granted Nov 29, 2011·1 cites·20 claims
- 4665US7940419B2Image forming method and apparatus for effectively positioning an image forming memberRICOH CO LTD·Filed 2006·Granted May 10, 2011·2 cites·8 claims
- 4757US8103195B2Toner agitating unit, toner hopper, process cartridge, and image forming apparatusYOSHIDA TOMOFUMI·Filed 2008·Granted Jan 24, 2012·1 cites·8 claims
- 4857USD590012SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Apr 7, 2009·10 cites·1 claims
- 4955USD580968SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Nov 18, 2008·9 cites·1 claims
- 5050USD590011SProcess cartridge for image forming apparatusRICOH KK·Filed 2007·Granted Apr 7, 2009·7 cites·1 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 →