Inventor · disambiguated record
Koichi Hiroshima
Also filed as: HIROSHIMA KOICHI
32 granted patents·935 citations·filing 1982–2014
98Inventor score
Top patents by PatentIndex Score
32 records- 0196US5450180AImage forming apparatus having constant current and voltage control in the charging and transfer regionsCANON KK·Filed 1994·Granted Sep 12, 1995·68 cites·93 claims
- 0295US5179397AImage forming apparatus with constant voltage and constant current controlCANON KK·Filed 1990·Granted Jan 12, 1993·65 cites·128 claims
- 0395US5172173AImage forming device and transfer belt having contact-type electricity feeding meansCANON KK·Filed 1989·Granted Dec 15, 1992·54 cites·6 claims
- 0493US6633734B2Image forming apparatus having density detecting meansCANON KK·Filed 2002·Granted Oct 14, 2003·45 cites·28 claims
- 0590US5264902AImage forming deviceCANON KK·Filed 1993·Granted Nov 23, 1993·40 cites·39 claims
- 0689US9563159B2Image heating apparatus and rotatable member for use with the image heating apparatusCANON KK·Filed 2014·Granted Feb 7, 2017·5 cites·5 claims
- 0789US6704521B2Image forming apparatus and image forming methodCANON KK·Filed 2001·Granted Mar 9, 2004·28 cites·39 claims
- 0889US5034777ATransferring device having charging device with double oxide and voltage controlCANON KK·Filed 1990·Granted Jul 23, 1991·40 cites·35 claims
- 0988US5159393AImage forming apparatus having transfer device and image bearing member traveling at different speedsCANON KK·Filed 1990·Granted Oct 27, 1992·37 cites·30 claims
- 1087US5732310AImage forming apparatus having cleaning device for cleaning intermediate transfer memberCANON KK·Filed 1996·Granted Mar 24, 1998·42 cites·29 claims
- 1187US5010370ATransfer apparatus and image bearing apparatus using same having transfer means for contacting a backside of a transfer materialCANON KK·Filed 1989·Granted Apr 23, 1991·30 cites·14 claims
- 1285US6381419B1Image forming apparatus with developer density and developer remaining amount detection featuresCANON KK·Filed 2000·Granted Apr 30, 2002·25 cites·30 claims
- 1385US6131010ARotatable member having elastic layer and fixing apparatus having said rotatable memberCANON KK·Filed 1997·Granted Oct 10, 2000·39 cites·37 claims
- 1485US5646717AImage forming apparatus having charging memberCANON KK·Filed 1995·Granted Jul 8, 1997·38 cites·115 claims
- 1585US5223900ATransfer roller with a resistance determined in accordance with its peripheral speedCANON KK·Filed 1991·Granted Jun 29, 1993·30 cites·11 claims
- 1683US5285245AElectrostatic transfer type image forming apparatus with recording material guide for changing direction of recording material separation from image transfer positionCANON KK·Filed 1992·Granted Feb 8, 1994·29 cites·10 claims
- 1782US5701568AImage forming apparatus having dielectric constant relationship between image bearing member, intermediate transfer member and contact transfer deviceCANON KK·Filed 1996·Granted Dec 23, 1997·33 cites·10 claims
- 1881US5198863AImage forming apparatusCANON KK·Filed 1991·Granted Mar 30, 1993·26 cites·41 claims
- 1980US5809373AImage forming apparatus which back-transfers residual toner from an intermediate transfer member to a photosensitive drumCANON KK·Filed 1996·Granted Sep 15, 1998·30 cites·8 claims
- 2079US6754454B1Image forming apparatus capable of discriminating a service life of detachably mounted process unitCANON KK·Filed 2000·Granted Jun 22, 2004·16 cites·29 claims
- 2179US4495086AMethod and apparatus for preparing emulsionsRANSBURG JAPAN LTD·Filed 1982·Granted Jan 22, 1985·35 cites·20 claims
- 2278US7110684B2Cartridge for replenishing developer including a memory device and a control system featuring the cartridgeCANON KK·Filed 2002·Granted Sep 19, 2006·14 cites·16 claims
- 2377US5043745ALight intensity control apparatusCANON KK·Filed 1989·Granted Aug 27, 1991·41 cites·17 claims
- 2473US5974281AImage forming apparatus using intermediate transfer memberCANON KK·Filed 1998·Granted Oct 26, 1999·22 cites·38 claims
- 2573US5412480AImage forming apparatus with fixer temperature controlCANON KK·Filed 1994·Granted May 2, 1995·15 cites·20 claims
- 2671US5455603AImage forming apparatus with feeder control based on pixel conversion statusCANON KK·Filed 1994·Granted Oct 3, 1995·26 cites·50 claims
- 2770US5999763ASimultaneous cleaning of residual toner and toner image formationCANON KK·Filed 1998·Granted Dec 7, 1999·20 cites·14 claims
- 2859US5572306AImage forming apparatus capable of setting fixing temperature corresponding to temperature rising state of heating memberCANON KK·Filed 1995·Granted Nov 5, 1996·13 cites·15 claims
- 2958US5274402AImage forming apparatus with fixer temperature controlCANON KK·Filed 1991·Granted Dec 28, 1993·9 cites·6 claims
- 3047US5694158AImage forming apparatus with image carrier and sheet feed drive controlCANON KK·Filed 1995·Granted Dec 2, 1997·12 cites·20 claims
- 3147US5512929AImage forming apparatus with fixer temperature controlCANON KK·Filed 1995·Granted Apr 30, 1996·6 cites·21 claims
- 3245US6718144B2Image forming apparatus and process unit mountable to image forming apparatusCANON KK·Filed 2002·Granted Apr 6, 2004·2 cites·25 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →