Inventor · disambiguated record
Tsukuru Kai
Also filed as: KAI TSUKURU
67 granted patents·2 pending applications·2,161 citations·filing 1990–2022
99Inventor score
Top patents by PatentIndex Score
69 records- 0199US6366751B1Image forming apparatus including preselected range between charge injection layer and voltage potentialRICOH KK·Filed 2000·Granted Apr 2, 2002·182 cites·57 claims
- 0298US6505014B2Image forming apparatus and an image forming process unitRICOH KK·Filed 2001·Granted Jan 7, 2003·116 cites·38 claims
- 0398US5109254ADeveloping apparatusRICOH KK·Filed 1990·Granted Apr 28, 1992·101 cites·22 claims
- 0497US6721516B2Image forming apparatusRICOH KK·Filed 2002·Granted Apr 13, 2004·85 cites·79 claims
- 0597US6125243AToner replenishing and developer replacing device for a developing unit of an image forming apparatusRICOH KK·Filed 1998·Granted Sep 26, 2000·106 cites·4 claims
- 0697US5915155AToner replenishing and developer replacing device for a developing unit of an image forming apparatusRICOH KK·Filed 1996·Granted Jun 22, 1999·110 cites·16 claims
- 0796US6757509B2Image forming apparatusRICOH KK·Filed 2001·Granted Jun 29, 2004·56 cites·10 claims
- 0896US6442364B2Image forming apparatus having a developer carrier capable of preventing toner adhesionRICOH KK·Filed 2001·Granted Aug 27, 2002·72 cites·16 claims
- 0996US5416568ADeveloping unit for an image forming apparatusRICOH KK·Filed 1993·Granted May 16, 1995·67 cites·25 claims
- 1096US5235384AImage forming apparatus with replaceable process unitsRICOH KK·Filed 1990·Granted Aug 10, 1993·72 cites·11 claims
- 1195US8385787B2Image forming apparatus and medium container installed thereinRICOH CO LTD·Filed 2010·Granted Feb 26, 2013·12 cites·19 claims
- 1295US6658227B2Development method apparatus, image formation and process cartridge for suppressing variation in toner chargeRICOH KK·Filed 2002·Granted Dec 2, 2003·63 cites·26 claims
- 1395US6597884B2Image forming apparatus including electrostatic conveyance of charged tonerRICOH KK·Filed 2001·Granted Jul 22, 2003·79 cites·59 claims
- 1494US8965250B2Cap, powder container, developer supply device, and image forming apparatusKOMATSU MAKOTO·Filed 2011·Granted Feb 24, 2015·8 cites·27 claims
- 1594US6671484B2Image forming apparatus having developing device with magnet roller with particular magnetic flux densityRICOH KK·Filed 2001·Granted Dec 30, 2003·45 cites·31 claims
- 1694US6597885B2Image forming apparatus having a developing device with a magnet brushRICOH KK·Filed 2001·Granted Jul 22, 2003·45 cites·68 claims
- 1794US5638159ADeveloping unit for an image forming apparatus and method of collecting bicomponent developer therefromRICOH KK·Filed 1995·Granted Jun 10, 1997·81 cites·8 claims
- 1894US5606408AImage forming apparatus and cleaning device thereforRICOH KK·Filed 1995·Granted Feb 25, 1997·73 cites·35 claims
- 1993US9740139B2Powder container including a container portion to be engaged with a powder replenishing deviceHOSOKAWA HIROSHI·Filed 2014·Granted Aug 22, 2017·5 cites·34 claims
- 2093US8886095B2Powder container, powder supply device and image-forming apparatusKOMATSU MAKOTO·Filed 2012·Granted Nov 11, 2014·8 cites·25 claims
- 2193US6819892B2Electrophotographic image forming apparatus including air conditioning means for removing harmful substancesRICOH KK·Filed 2002·Granted Nov 16, 2004·42 cites·124 claims
- 2293US5774772AToner cartridge having a toner stirring memberRICOH KK·Filed 1996·Granted Jun 30, 1998·66 cites·65 claims
- 2392US8295742B2Powder container, powder supplying device, and image forming apparatusYAMAGUCHI DAICHI·Filed 2009·Granted Oct 23, 2012·11 cites·14 claims
- 2492US6778805B2Image forming apparatus having a developing device with a magnet brushRICOH KK·Filed 2003·Granted Aug 17, 2004·34 cites·95 claims
- 2592US6757511B2Image forming apparatus and method using a magnetic toner brushRICOH KK·Filed 2002·Granted Jun 29, 2004·40 cites·38 claims
- 2692US6701114B2Image forming apparatus and image forming process unit with developer carried on a developer carrierRICOH KK·Filed 2002·Granted Mar 2, 2004·43 cites·69 claims
- 2791US5367363AImage forming apparatus having rotatable electrophotographic process unitRICOH KK·Filed 1991·Granted Nov 22, 1994·42 cites·35 claims
- 2890US8571449B2Development device, process cartridge, and image forming apparatusMIYOSHI YASUO·Filed 2010·Granted Oct 29, 2013·5 cites·58 claims
- 2990US6792234B2Developing device having a developer carrier including main and auxiliary magnetic poles and image forming apparatus using the sameRICOH KK·Filed 2002·Granted Sep 14, 2004·35 cites·21 claims
- 3090US5619316AImage forming apparatusRICOH KK·Filed 1996·Granted Apr 8, 1997·53 cites·5 claims
- 3189US9405221B2Powder container and image forming apparatus incorporating sameKOMATSU MAKOTO·Filed 2013·Granted Aug 2, 2016·5 cites·23 claims
- 3289US8750752B2Development device including a removable seal to seal a supplied-developer and/or a collected-developer communicating areaMIYOSHI YASUO·Filed 2013·Granted Jun 10, 2014·4 cites·12 claims
- 3389US6385423B1Image forming apparatus and developing device therefor capable of increasing image density of a low contrast imageRICOH KK·Filed 2000·Granted May 7, 2002·30 cites·60 claims
- 3488US6449452B1Method and apparatus for image developing capable of using developer in a magnet brush formRICOH KK·Filed 2000·Granted Sep 10, 2002·30 cites·53 claims
- 3587US6901233B2Image forming apparatusRICOH KK·Filed 2003·Granted May 31, 2005·23 cites·13 claims
- 3687US6819901B1Developing method and a developing device for image forming apparatusRICOH KK·Filed 2000·Granted Nov 16, 2004·27 cites·29 claims
- 3785US6978109B2Image forming apparatusRICOH KK·Filed 2004·Granted Dec 20, 2005·20 cites·24 claims
- 3884US6456806B2Developing method, device, and image forming apparatus with magnet brushRICOH KK·Filed 2001·Granted Sep 24, 2002·22 cites·22 claims
- 3983US8934813B2Image-forming apparatus and powder containerHOSOKAWA HIROSHI·Filed 2012·Granted Jan 13, 2015·3 cites·18 claims
- 4082US6823163B2Image forming apparatus including an electric field having an oscillation component between an image carrier and a developer carrierRICOH KK·Filed 2001·Granted Nov 23, 2004·20 cites·8 claims
- 4182US5255059AImage forming apparatusRICOH KK·Filed 1992·Granted Oct 19, 1993·27 cites·6 claims
- 4280US11550239B2Powder container, powder supply device and image forming apparatusRICOH CO LTD·Filed 2022·Granted Jan 10, 2023·0 cites·7 claims
- 4380US8135314B2Developing device, process cartridge, and image forming apparatus, method of developing latent imageMIYOSHI YASUO·Filed 2008·Granted Mar 13, 2012·6 cites·19 claims
- 4479US10908531B2Powder container, powder supply device and image forming apparatusRICOH CO LTD·Filed 2019·Granted Feb 2, 2021·0 cites·19 claims
- 4579USRE36301EImage forming apparatus having rotatable electrophotographic process unitRICOH KK·Filed 1996·Granted Sep 14, 1999·25 cites·36 claims
- 4678US5598254ACartridge for replenishing two-ingredient developer to an image forming apparatus and a replenishing device using the sameRICOH KK·Filed 1995·Granted Jan 28, 1997·54 cites·8 claims
- 4777US11249421B2Powder container, powder supply device and image forming apparatusRICOH CO LTD·Filed 2021·Granted Feb 15, 2022·0 cites·11 claims
- 4877US10466623B2Powder container, powder supply device and image forming apparatusRICOH CO LTD·Filed 2019·Granted Nov 5, 2019·0 cites·19 claims
- 4977US6081684AMethod and apparatus for image forming capable of performing an improved circulation of developerRICOH KK·Filed 1999·Granted Jun 27, 2000·33 cites·14 claims
- 5076US11281124B2Powder container, powder supply device and image forming apparatusRICOH CO LTD·Filed 2021·Granted Mar 22, 2022·0 cites·8 claims
Showing the top 50 of 69 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →