Inventor · disambiguated record
Yasushi Koichi
Also filed as: KOICHI YASUSHI
29 granted patents·756 citations·filing 1979–2009
98Inventor score
Technology areasG03G
Top patents by PatentIndex Score
29 records- 0197US5327196AImage forming methodRICOH KK·Filed 1992·Granted Jul 5, 1994·83 cites·17 claims
- 0296US7315711B2Image forming apparatus, process cartridge and cleaningless systemRICOH KK·Filed 2005·Granted Jan 1, 2008·25 cites·53 claims
- 0396US5387965AToner concentration control methodRICOH KK·Filed 1992·Granted Feb 7, 1995·75 cites·16 claims
- 0495US7273688B2Image forming method and image forming apparatus for sameRICOH KK·Filed 2006·Granted Sep 25, 2007·15 cites·8 claims
- 0592US7218879B2Image forming apparatus controlling polarity of residual toner and process cartridge for use in the sameRICOH KK·Filed 2004·Granted May 15, 2007·39 cites·14 claims
- 0692US6934484B2Image-forming apparatus and image-forming methodRICOH KK·Filed 2003·Granted Aug 23, 2005·40 cites·30 claims
- 0791US6835517B2Toner, developer and image forming method using the tonerRICOH KK·Filed 2002·Granted Dec 28, 2004·36 cites·23 claims
- 0891US4734737AControl of toner concentration in a developerRICOH KK·Filed 1985·Granted Mar 29, 1988·38 cites·11 claims
- 0990US6899986B2Image forming method and toner for use in the methodRICOH KK·Filed 2002·Granted May 31, 2005·28 cites·22 claims
- 1090US5006896AImage density control method for an image forming apparatusRICOH KK·Filed 1989·Granted Apr 9, 1991·37 cites·9 claims
- 1190US4279498AElectrostatographic copying apparatus with automatic toner density controlRICOH KK·Filed 1979·Granted Jul 21, 1981·28 cites·19 claims
- 1288US4885466ACorona wire cleaning device utilizing a position detection systemRICOH KK·Filed 1988·Granted Dec 5, 1989·43 cites·4 claims
- 1387US7162187B2Image forming apparatus and image forming methodRICOH KK·Filed 2004·Granted Jan 9, 2007·25 cites·12 claims
- 1487US7125638B2Image forming method and image forming apparatus for sameRICOH KK·Filed 2004·Granted Oct 24, 2006·21 cites·31 claims
- 1585US5038175AImage density control methodRICOH KK·Filed 1990·Granted Aug 6, 1991·33 cites·5 claims
- 1684US5400127AToner recovery system which detects linear movement of a recovered toner transporterRICOH KK·Filed 1993·Granted Mar 21, 1995·30 cites·13 claims
- 1781US7515860B2Image forming method and image forming apparatus for sameRICOH KK·Filed 2007·Granted Apr 7, 2009·4 cites·5 claims
- 1879US4962394AToner density control device for an image recorderRICOH KK·Filed 1989·Granted Oct 9, 1990·22 cites·7 claims
- 1979US4639117ARecording image density control method for electrophotographyRICOH KK·Filed 1982·Granted Jan 27, 1987·21 cites·5 claims
- 2078US5049939AMethod of controlling image formation in image generating apparatusRICOH KK·Filed 1988·Granted Sep 17, 1991·21 cites·2 claims
- 2177US7639957B2Image forming apparatus including controller to detect condition of image developerRICOH KK·Filed 2007·Granted Dec 29, 2009·5 cites·19 claims
- 2274US4551005AMethod of forming images of sensor patterns in effecting image density control of electrophotographic copying apparatusRICOH KK·Filed 1983·Granted Nov 5, 1985·18 cites·4 claims
- 2373US5508787AMethod and apparatus for controlling process condition for image formationRICOH KK·Filed 1994·Granted Apr 16, 1996·18 cites·19 claims
- 2471US7150954B2Image forming method and toner for use in the methodRICOH KK·Filed 2004·Granted Dec 19, 2006·10 cites·11 claims
- 2571US4522481AToner supply control method for electrophotographic copierRICOH KK·Filed 1983·Granted Jun 11, 1985·15 cites·10 claims
- 2669US4885612ACleaning device for an image forming apparatusRICOH KK·Filed 1988·Granted Dec 5, 1989·16 cites·10 claims
- 2759US7840152B2Image forming apparatus, process cartridge, cleaning system, and image forming apparatus with cleaning systemRICOH CO LTD·Filed 2009·Granted Nov 23, 2010·1 cites·12 claims
- 2857US7499664B2Image processing apparatus, process cartridge, and cleaning system with residual toner retaining unitRICOH KK·Filed 2004·Granted Mar 3, 2009·5 cites·22 claims
- 2951US7548349B2Image forming apparatus to prevent toner deformationRICOH KK·Filed 2003·Granted Jun 16, 2009·4 cites·25 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →