Inventor · disambiguated record
Takahiro Yoshikawa
Also filed as: YOSHIKAWA TAKAHIRO
60 granted patents·33 pending applications·684 citations·filing 1985–2022
98Inventor score
Top patents by PatentIndex Score
93 records- 0198US7313353B2Fixing unit with heat-resisting resin base member and image forming toner for use in the fixing unitRICOH KK·Filed 2006·Granted Dec 25, 2007·87 cites·33 claims
- 0298US7127204B2Belt fixing unit with heat-resisting resin base member and image forming toner for use in the fixing unitRICOH KK·Filed 2004·Granted Oct 24, 2006·101 cites·19 claims
- 0396US5402211AHeated fixing roller with selectively heatable portionsRICOH KK·Filed 1993·Granted Mar 28, 1995·69 cites·21 claims
- 0494US8870437B2Lighting device, display device, and television receiverYOSHIKAWA TAKAHIRO·Filed 2010·Granted Oct 28, 2014·13 cites·11 claims
- 0593US7366456B2Fixing apparatus and image forming apparatusRICOH KK·Filed 2006·Granted Apr 29, 2008·13 cites·46 claims
- 0693US6823149B2Image forming apparatus with variable speed transferring and fixing devicesRICOH KK·Filed 2003·Granted Nov 23, 2004·43 cites·5 claims
- 0792US8463150B2Fixing device and image forming apparatus incorporating sameYOSHIKAWA TAKAHIRO·Filed 2010·Granted Jun 11, 2013·8 cites·10 claims
- 0892US7653321B2Image forming apparatus, fixing device, and image forming methodRICOH KK·Filed 2007·Granted Jan 26, 2010·14 cites·20 claims
- 0991US7949290B2Image fixing apparatus and an image formation apparatus including a magnetic flux adjusterRICOH CO LTD·Filed 2007·Granted May 24, 2011·12 cites·19 claims
- 1091US6501914B2Jam detector for an image fixing apparatusRICOH KK·Filed 2001·Granted Dec 31, 2002·39 cites·46 claims
- 1191US5850588AImage forming apparatus having an improved web type cleaning device for a fixing rollerRICOH KK·Filed 1997·Granted Dec 15, 1998·55 cites·19 claims
- 1290US7460797B2Belt type fixing device including a contact and a non-contact temperature sensor and a reflection type sheet sensorRICOH KK·Filed 2006·Granted Dec 2, 2008·11 cites·9 claims
- 1390US7043185B2Fixing apparatus and image forming apparatus for fixing a toner image on a recording mediumRICOH KK·Filed 2003·Granted May 9, 2006·30 cites·19 claims
- 1489US8827482B2Lighting device, display device and television receiverYOSHIKAWA TAKAHIRO·Filed 2010·Granted Sep 9, 2014·7 cites·6 claims
- 1588US6757502B2Image forming apparatusRICOH KK·Filed 2001·Granted Jun 29, 2004·29 cites·8 claims
- 1686US8547499B2Lighting device, display device and television receiverYOSHIKAWA TAKAHIRO·Filed 2010·Granted Oct 1, 2013·5 cites·36 claims
- 1786US7174124B2Tandem color image forming apparatus with an image transfer belt and backup rollerRICOH KK·Filed 2003·Granted Feb 6, 2007·25 cites·36 claims
- 1885US11402569B2Optical sheet for light guide plate type liquid crystal display, backlight unit for light guide plate type liquid crystal display, and light guide plate type liquid crystal displayNITTO DENKO CORP·Filed 2018·Granted Aug 2, 2022·4 cites·9 claims
- 1985US10655030B2Water-based inkKAO CORP·Filed 2016·Granted May 19, 2020·2 cites·16 claims
- 2083US9488770B2Light source unit and display apparatusSAKAI DISPLAY PRODUCTS CORP·Filed 2013·Granted Nov 8, 2016·8 cites·11 claims
- 2182US11994709B2Optical member, and backlight unit and image display device using said optical memberNITTO DENKO CORP·Filed 2021·Granted May 28, 2024·1 cites·15 claims
- 2282US9411455B2Display device with touch panelSHARP KK·Filed 2013·Granted Aug 9, 2016·6 cites·5 claims
- 2381US7292801B2Fixing device, fixing method, image forming apparatus, image forming methodRICOH KK·Filed 2004·Granted Nov 6, 2007·19 cites·11 claims
- 2479US11940120B2Desktop illumination deviceNITTO DENKO CORP·Filed 2021·Granted Mar 26, 2024·1 cites·17 claims
- 2579US10316207B2Water-based inkKAO CORP·Filed 2015·Granted Jun 11, 2019·1 cites·19 claims
- 2679US8223292B2Lighting device for use with display apparatus and display apparatusYOSHIKAWA TAKAHIRO·Filed 2008·Granted Jul 17, 2012·5 cites·14 claims
- 2777US7672607B2Fixing device to reduce warm-up time and apparatus using sameRICOH KK·Filed 2005·Granted Mar 2, 2010·5 cites·14 claims
- 2877US6160974AImage forming apparatus capable of switching a sheet interval mode during an image forming cycleRICOH KK·Filed 1998·Granted Dec 12, 2000·30 cites·3 claims
- 2976US8055174B2Fixing device using induction heating and image forming apparatus using the fixing deviceRICOH CO LTD·Filed 2008·Granted Nov 8, 2011·4 cites·20 claims
- 3075US9952458B2Display apparatusSAKAI DISPLAY PRODUCTS CORP·Filed 2014·Granted Apr 24, 2018·2 cites·10 claims
- 3170US9952381B2Light source device and display apparatusSAKAI DISPLAY PRODUCTS CORP·Filed 2014·Granted Apr 24, 2018·1 cites·8 claims
- 3270US8358959B2Fixing device and image forming apparatus incorporating sameRICOH CO LTD·Filed 2010·Granted Jan 22, 2013·1 cites·9 claims
- 3370US8071832B2Method of converting ethylbenzene and process for producing p-xyleneYOSHIKAWA TAKAHIRO·Filed 2009·Granted Dec 6, 2011·1 cites·12 claims
- 3469US8436961B2Backlight unit and display deviceYOSHIKAWA TAKAHIRO·Filed 2010·Granted May 7, 2013·1 cites·18 claims
- 3569US8425069B2Lighting device, display device and television receiverYAMAMOTO SHUKI·Filed 2008·Granted Apr 23, 2013·6 cites·6 claims
- 3664US2021027970A1Optical member, and backlight unit and liquid crystal display device using said optical memberNITTO DENKO CORP·Filed 2020·Application pending·0 cites
- 3763US12454631B2Optical laminate with double-sided adhesive layer, and optical deviceNITTO DENKO CORP·Filed 2021·Granted Oct 28, 2025·0 cites·13 claims
- 3863US2019051484A1Optical member, and backlight unit and liquid crystal display device using said optical memberNITTO DENKO CORP·Filed 2017·Application pending·0 cites
- 3961US4695175AColor printer having apparatus for shifting ink ribbonFUJITSU LTD·Filed 1985·Granted Sep 22, 1987·13 cites·17 claims
- 4060US10907816B2Connector, connector mounting board, illumination device, and display deviceSAKAI DISPLAY PRODUCTS CORP·Filed 2016·Granted Feb 2, 2021·2 cites·14 claims
- 4159US8526871B2Fixing device and image forming apparatus incorporating sameYOSHIKAWA TAKAHIRO·Filed 2012·Granted Sep 3, 2013·0 cites·11 claims
- 4258US12044880B2Backlight unit and image display deviceNITTO DENKO CORP·Filed 2021·Granted Jul 23, 2024·0 cites·15 claims
- 4357US9557667B2Method for producing resin particle dispersion, and method for producing toner for electrostatic charge image development useKAO CORP·Filed 2014·Granted Jan 31, 2017·0 cites·18 claims
- 4457US2025320336A1Powder composition, method of producing three-dimensional model object by powder bed fusion method using powder composition, and three-dimensional model objectTORAY INDUSTRIES·Filed 2022·Application pending·0 cites
- 4556US8300179B2Fluorescent tube, illuminating apparatus for display device, and display deviceYOSHIKAWA TAKAHIRO·Filed 2008·Granted Oct 30, 2012·0 cites·4 claims
- 4656US8170461B2Image forming apparatus including pre-heating unitYOSHIKAWA TAKAHIRO·Filed 2009·Granted May 1, 2012·1 cites·19 claims
- 4755US12105313B2Lighting deviceNITTO DENKO CORP·Filed 2021·Granted Oct 1, 2024·0 cites·12 claims
- 4854US11921311B2Illumination deviceNITTO DENKO CORP·Filed 2021·Granted Mar 5, 2024·0 cites·11 claims
- 4953US11966075B2Optical member and backlight unit using said optical member, and image display deviceNITTO DENKO CORP·Filed 2021·Granted Apr 23, 2024·0 cites·3 claims
- 5052US9128399B2Toners for electrophotographyKAO CORP·Filed 2013·Granted Sep 8, 2015·0 cites·21 claims
Showing the top 50 of 93 patent records by PatentIndex Score.
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