Inventor · disambiguated record
Yasuo Takuma
Also filed as: TAKUMA YASUO
26 granted patents·292 citations·filing 1990–2012
96Inventor score
Technology areasG03G
Top patents by PatentIndex Score
26 records- 0192US5600405ABias cleaning system and electrostatic printing apparatus therewith and operating method thereofHITACHI LTD·Filed 1994·Granted Feb 4, 1997·46 cites·25 claims
- 0292US5291253ACorona deterioration and moisture compensation for transfer unit in an electrophotographic apparatusHITACHI LTD·Filed 1990·Granted Mar 1, 1994·49 cites·22 claims
- 0389US5923933AElectrophotographic apparatusHITACHI KOKI KK·Filed 1998·Granted Jul 13, 1999·49 cites·14 claims
- 0480US7463849B2Image forming apparatus including static pre-eliminatorRICOH PRINTING SYS LTD·Filed 2006·Granted Dec 9, 2008·6 cites·5 claims
- 0577US7142794B2Image forming apparatusRICOH PRINTING SYS LTD·Filed 2005·Granted Nov 28, 2006·5 cites·16 claims
- 0677US5499086ABelt type transfer device for electrophotographic apparatusHITACHI LTD·Filed 1993·Granted Mar 12, 1996·24 cites·22 claims
- 0776US8639150B2Development device and image forming apparatusOHMURA TOMOYA·Filed 2011·Granted Jan 28, 2014·2 cites·18 claims
- 0874US7962055B2Image forming apparatusRICOH CO LTD·Filed 2007·Granted Jun 14, 2011·4 cites·21 claims
- 0974US5666598AImage forming method and apparatus using energy beam impingement on image forming particles to move the sameHITACHI LTD·Filed 1995·Granted Sep 9, 1997·24 cites·32 claims
- 1069US7493063B2Image-forming device comprising a contact charging unitRICOH KK·Filed 2006·Granted Feb 17, 2009·3 cites·7 claims
- 1166US8666288B2Developing device and image forming apparatusMATSUMOTO JUNICHI·Filed 2011·Granted Mar 4, 2014·1 cites·18 claims
- 1265US5459562ARecording apparatus for printing both faces of a recording medium using an electrophotographyprocessHITACHI LTD·Filed 1994·Granted Oct 17, 1995·16 cites·14 claims
- 1362US5701570AImage forming apparatus employing residual toner recovery schemeHITACHI LTD·Filed 1995·Granted Dec 23, 1997·15 cites·14 claims
- 1460US5559578AElectrostatic recording apparatus with electrified cap and managing system thereofHITACHI LTD·Filed 1993·Granted Sep 24, 1996·12 cites·26 claims
- 1557US6330414B1Developing system having a plurality of developing rollers with opposing magnets of same polarityHITACHI KOKI KK·Filed 1999·Granted Dec 11, 2001·14 cites·14 claims
- 1650US6487384B2Image forming electrophotography apparatus and magnetic developing unitHITACHI KOKI KK·Filed 2001·Granted Nov 26, 2002·4 cites·15 claims
- 1745US8688012B2Developing device and image forming apparatusMATSUMOTO JUNICHI·Filed 2011·Granted Apr 1, 2014·0 cites·19 claims
- 1845US8615186B2Development device and image forming apparatus incorporating sameKIKUCHI HIROSHI·Filed 2012·Granted Dec 24, 2013·0 cites·6 claims
- 1944US9031471B2Development device and image forming apparatus incorporating sameOHMURA TOMOYA·Filed 2011·Granted May 12, 2015·0 cites·20 claims
- 2043US8682187B2Development device and image forming apparatus incorporating sameTAKUMA YASUO·Filed 2011·Granted Mar 25, 2014·0 cites·14 claims
- 2143US8515316B2Developing device and image forming apparatusMATSUMOTO JUNICHI·Filed 2011·Granted Aug 20, 2013·0 cites·13 claims
- 2242US7158731B2Image forming apparatus with toner concentration controllerRICOH PRINTING SYS LTD·Filed 2004·Granted Jan 2, 2007·2 cites·19 claims
- 2342US5907755ADeveloping deviceHITACHI KOKI KK·Filed 1998·Granted May 25, 1999·6 cites·2 claims
- 2441US5373351AElectrostatic recording apparatus and managing system thereofHITACHI LTD·Filed 1992·Granted Dec 13, 1994·5 cites·10 claims
- 2540US7796905B2Multicolor image forming apparatusRICOH KK·Filed 2006·Granted Sep 14, 2010·0 cites·22 claims
- 2639US5574546ADeveloping apparatus for an electrophotographic machineHITACHI LTD·Filed 1995·Granted Nov 12, 1996·5 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →