Inventor · disambiguated record
Tetsumaru Fujita
Also filed as: FUJITA TETSUMARU
35 granted patents·3 pending applications·122 citations·filing 1996–2022
95Inventor score
Top patents by PatentIndex Score
38 records- 0190US6343201B1Developing apparatus comprising developing roller that is rotated upward from below in developing area and image forming apparatus using the sameMINOLTA CO LTD·Filed 2000·Granted Jan 29, 2002·36 cites·23 claims
- 0278US7684732B2Process unit and image forming apparatus including the sameRICOH KK·Filed 2007·Granted Mar 23, 2010·5 cites·13 claims
- 0377US7738803B2Image forming method and apparatus for effectively charging an image carrierRICOH KK·Filed 2007·Granted Jun 15, 2010·5 cites·20 claims
- 0474US7664433B2Cleaning of a charging member in an image forming apparatusRICOH KK·Filed 2008·Granted Feb 16, 2010·4 cites·12 claims
- 0573US8594519B2Image forming apparatus and toner supply methodNAKATAKE NAOKI·Filed 2011·Granted Nov 26, 2013·2 cites·11 claims
- 0671US5940661AImage forming apparatus with a charging member which removes smears on an image forming memberMINOLTA CO LTD·Filed 1998·Granted Aug 17, 1999·22 cites·35 claims
- 0771US5754926ACharging deviceMINOLTA CO LTD·Filed 1996·Granted May 19, 1998·21 cites·19 claims
- 0870US8483583B2Image forming apparatus and toner supply methodTAKEHARA ATSUSHI·Filed 2011·Granted Jul 9, 2013·2 cites·10 claims
- 0970US7725054B2Electrifying apparatus, a processing unit, and an image formation apparatusRICOH KK·Filed 2007·Granted May 25, 2010·3 cites·12 claims
- 1068US11946860B2Electronic deviceFUJITA TETSUMARU·Filed 2022·Granted Apr 2, 2024·0 cites·12 claims
- 1166US8503892B2Developing unit, image forming apparatus, and process cartridgeSAKAYA KOHTA·Filed 2011·Granted Aug 6, 2013·1 cites·18 claims
- 1262US9014593B2Sealing assembly, developing device, process unit, and image forming apparatus incorporating sameOGATA YASUNOBU·Filed 2013·Granted Apr 21, 2015·1 cites·13 claims
- 1361US7907871B2Image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 15, 2011·2 cites·18 claims
- 1461US7903993B2Image forming apparatusRICOH CO LTD·Filed 2008·Granted Mar 8, 2011·2 cites·20 claims
- 1561US7822356B2Image forming apparatusRICOH KK·Filed 2008·Granted Oct 26, 2010·2 cites·14 claims
- 1661US6782226B2Developing deviceMINOLTA CO LTD·Filed 2003·Granted Aug 24, 2004·8 cites·6 claims
- 1757US9201393B2Toner container, process cartridge, and image forming apparatusFURUICHI YUUSUKE·Filed 2014·Granted Dec 1, 2015·0 cites·13 claims
- 1857US7539442B2Charging unit, process unit including the same, and image forming apparatus including the sameRICOH KK·Filed 2007·Granted May 26, 2009·1 cites·20 claims
- 1956US8354164B2Semiconductive member, and developing roll, charging roll, transfer belt, and image forming apparatus using sameRICOH CO LTD·Filed 2009·Granted Jan 15, 2013·1 cites·4 claims
- 2055US7751753B2Cleanerless image forming apparatusRICOH KK·Filed 2007·Granted Jul 6, 2010·1 cites·19 claims
- 2153US9002243B2Developing device and process unit and image forming apparatus incorporating sameFUJITA TETSUMARU·Filed 2014·Granted Apr 7, 2015·0 cites·7 claims
- 2250US12135416B2Light deflector, distance measuring device, projection device, and mobile objectFUJITA TETSUMARU·Filed 2021·Granted Nov 5, 2024·0 cites·16 claims
- 2348US9958806B2Developing device and image forming apparatus incorporating sameTSUJI MASATO·Filed 2016·Granted May 1, 2018·0 cites·8 claims
- 2445US8452216B2Image forming apparatus which mixes new unused toner with used old tonerFUJITA TETSUMARU·Filed 2010·Granted May 28, 2013·0 cites·9 claims
- 2545US7792463B2Image forming apparatus including a brush member to temporarily capture tonerRICOH KK·Filed 2008·Granted Sep 7, 2010·0 cites·14 claims
- 2645US7693459B2Charging device for charging a surface of a latent image bearing member and an image forming apparatus including the charging deviceRICOH KK·Filed 2007·Granted Apr 6, 2010·0 cites·14 claims
- 2744US8036573B2Process cartridge and image forming apparatus including a toner charge control device with an endless beltRICOH CO LTD·Filed 2008·Granted Oct 11, 2011·0 cites·18 claims
- 2843US8688015B2Development device, processing unit and image forming apparatusFUJITA TETSUMARU·Filed 2011·Granted Apr 1, 2014·0 cites·20 claims
- 2943US7796935B2Process cartridge and image forming apparatus including sameRICOH KK·Filed 2008·Granted Sep 14, 2010·0 cites·19 claims
- 3042US10036976B2Developing device, and image forming apparatus and process unit incorporating sameNAGATOMO YUJI·Filed 2016·Granted Jul 31, 2018·0 cites·15 claims
- 3142US8406664B2Image forming apparatus, image forming method, and developing deviceFUJITA TETSUMARU·Filed 2008·Granted Mar 26, 2013·0 cites·18 claims
- 3241US7796912B2Image forming method and apparatus which uses alternating voltage to form an electric field for moving tonerRICOH KK·Filed 2008·Granted Sep 14, 2010·0 cites·20 claims
- 3341US7627270B2Image forming apparatus that effectively charges a latent image carrierRICOH KK·Filed 2007·Granted Dec 1, 2009·0 cites·10 claims
- 3440US7734223B2Image forming apparatus and process cartridge employing the same having brush roller chargerRICOH KK·Filed 2006·Granted Jun 8, 2010·0 cites·3 claims
- 3538US2008038017A1Method and apparatus for image forming for effectively charging an image carrierFUJITA TETSUMARU·Filed 2007·Application pending·0 cites
- 3637US2007065179A1Image forming apparatus having a charging brush capable of effectively removing contaminants including residual fine tonerFUJITA TETSUMARU·Filed 2006·Application pending·0 cites
- 3736US2008227001A1Image forming method and process cartridgeKADOTA TAKUYA·Filed 2008·Application pending·0 cites
- 3835US6134414ADeveloping apparatus using voltage waveforms with straight line portionsMINOLTA CO LTD·Filed 1999·Granted Oct 17, 2000·3 cites·25 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →