Inventor · disambiguated record
Keisuke Ichikawa
Also filed as: ICHIKAWA KEISUKE
53 granted patents·5 pending applications·135 citations·filing 2003–2024
97Inventor score
Top patents by PatentIndex Score
58 records- 0188US8446512B2Image forming optical system and electronic image pickup apparatus equipped with sameICHIKAWA KEISUKE·Filed 2011·Granted May 21, 2013·9 cites·5 claims
- 0288US7830613B2Zoom lens and an imaging apparatus incorporating the sameOLYMPUS IMAGING CORP·Filed 2009·Granted Nov 9, 2010·18 cites·39 claims
- 0387US10663705B2Single-focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2018·Granted May 26, 2020·5 cites·26 claims
- 0487US9958653B2Imaging optical system and optical apparatus including the sameOLYMPUS CORP·Filed 2016·Granted May 1, 2018·5 cites·37 claims
- 0587US9952416B2Imaging optical system and optical apparatus including the sameOLYMPUS CORP·Filed 2016·Granted Apr 24, 2018·5 cites·20 claims
- 0686US10274705B2Single-focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2017·Granted Apr 30, 2019·4 cites·26 claims
- 0786US9602733B2Image forming optical system and electronic image pickup apparatus using the sameOLYMPUS CORP·Filed 2015·Granted Mar 21, 2017·5 cites·17 claims
- 0885US10114200B2Imaging optical system and optical apparatus including the sameOLYMPUS CORP·Filed 2016·Granted Oct 30, 2018·4 cites·21 claims
- 0982US12066603B2Wide-angle optical system including three lens units of −++ refractive powers, and image pickup apparatus using the sameOLYMPUS CORP·Filed 2021·Granted Aug 20, 2024·1 cites·36 claims
- 1082US10191253B2Single focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2017·Granted Jan 29, 2019·3 cites·25 claims
- 1181US10830991B2Single-focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2018·Granted Nov 10, 2020·3 cites·25 claims
- 1281US10197768B2Single focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2017·Granted Feb 5, 2019·3 cites·34 claims
- 1381US10197769B2Single-focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2017·Granted Feb 5, 2019·3 cites·22 claims
- 1481US10191258B2Single-focus optical system and optical apparatus using the sameOLYMPUS CORP·Filed 2017·Granted Jan 29, 2019·3 cites·25 claims
- 1578US9329369B2Optical system and optical instrument, image pickup apparatus, and image pickup system using the sameOLYMPUS CORP·Filed 2015·Granted May 3, 2016·2 cites·35 claims
- 1675US9400371B2Image forming lens system and image pickup apparatus using the sameOLYMPUS CORP·Filed 2014·Granted Jul 26, 2016·2 cites·71 claims
- 1775US7266698B2Time stamping system for electronic documents and program medium for the sameAMANO CORP·Filed 2003·Granted Sep 4, 2007·22 cites·7 claims
- 1874US9019621B2Objective optical system and observation apparatus provided with the sameOLYMPUS CORP·Filed 2012·Granted Apr 28, 2015·3 cites·42 claims
- 1974US8657720B2Shift control apparatus for continuously variable transmissionJATCO LTD·Filed 2012·Granted Feb 25, 2014·4 cites·5 claims
- 2074US8351129B2Zoom lens and electronic imaging apparatus incorporating the sameOLYMPUS IMAGING CORP·Filed 2011·Granted Jan 8, 2013·3 cites·10 claims
- 2170US8593735B2Image forming optical system and electronic image pickup apparatus using the sameICHIKAWA KEISUKE·Filed 2011·Granted Nov 26, 2013·2 cites·29 claims
- 2270US7535652B2Zoom optical system and electronic imaging apparatus using the sameOLYMPUS CORP·Filed 2007·Granted May 19, 2009·5 cites·15 claims
- 2368US8617029B2Shift control apparatus for continuously variable transmissionJATCO LTD·Filed 2012·Granted Dec 31, 2013·3 cites·8 claims
- 2468US8599491B2Zoom lens and electronic imaging apparatus incorporating the sameKON TOYOKI·Filed 2011·Granted Dec 3, 2013·2 cites·22 claims
- 2568US7403345B2Zoom optical system and electronic imaging apparatus using the sameOLYMPUS CORP·Filed 2007·Granted Jul 22, 2008·4 cites·18 claims
- 2666US9500841B2Zoom lens, and imaging apparatus incorporating the sameICHIKAWA KEISUKE·Filed 2012·Granted Nov 22, 2016·2 cites·15 claims
- 2766US7760441B2Zoom lens and imaging apparatus incorporating the sameOLYMPUS IMAGING CORP·Filed 2008·Granted Jul 20, 2010·4 cites·43 claims
- 2865US10185131B2Zoom lens and lens barrel and image pickup apparatus using the sameOLYMPUS CORP·Filed 2016·Granted Jan 22, 2019·1 cites·18 claims
- 2963US2025334790A1Objective optical system for endoscope and endoscope having sameOLYMPUS CORP·Filed 2024·Application pending·0 cites
- 3060US8477230B2Image forming optical system and electronic image pickup apparatus using the sameARAKAWA MASAKI·Filed 2011·Granted Jul 2, 2013·2 cites·11 claims
- 3159US9151937B2Optical system and optical instrument, image pickup apparatus, and image pickup system using the sameOLYMPUS CORP·Filed 2014·Granted Oct 6, 2015·0 cites·10 claims
- 3259US7522347B2Zoom optical system and electronic imaging apparatus using the sameOLYMPUS CORP·Filed 2007·Granted Apr 21, 2009·2 cites·20 claims
- 3357US9134517B2Zoom lens and image pickup apparatus using the sameOLYMPUS CORP·Filed 2014·Granted Sep 15, 2015·0 cites·11 claims
- 3456US11326689B2Shifter abnormality diagnosis device and shifter abnormality diagnosis methodJATCO LTD·Filed 2018·Granted May 10, 2022·0 cites·4 claims
- 3556US11022190B2Vehicle control device and vehicle control methodJATCO LTD·Filed 2018·Granted Jun 1, 2021·0 cites·6 claims
- 3656US9964742B2Optical system and optical instrument, image pickup apparatus, and image pickup system using the sameOLYMPUS CORP·Filed 2016·Granted May 8, 2018·0 cites·17 claims
- 3755US7848030B2Image forming optical system and electronic image pickup apparatus using image forming optical systemOLYMPUS CORP·Filed 2006·Granted Dec 7, 2010·1 cites·11 claims
- 3852US12117602B2Wide-angle optical system and image pickup apparatus using the sameOLYMPUS CORP·Filed 2021·Granted Oct 15, 2024·0 cites·30 claims
- 3952US9448392B2Zoom lens and image pickup apparatus using the sameOLYMPUS CORP·Filed 2015·Granted Sep 20, 2016·0 cites·16 claims
- 4051US9946050B2Image forming lens system and image pickup apparatus using the sameOLYMPUS CORP·Filed 2016·Granted Apr 17, 2018·0 cites·20 claims
- 4150US12085707B2Wide-angle optical system and image pickup apparatus using the sameOLYMPUS CORP·Filed 2021·Granted Sep 10, 2024·0 cites·34 claims
- 4248US2011102625A1Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical SystemMIHARA SHINICHI·Filed 2010·Application pending·0 cites
- 4347US7898743B2Image forming optical system and electronic image pickup apparatus using image forming optical systemOLYMPUS CORP·Filed 2006·Granted Mar 1, 2011·0 cites·12 claims
- 4445US8184376B2Three unit zoom lens and image pickup apparatus equipped with sameICHIKAWA KEISUKE·Filed 2009·Granted May 22, 2012·0 cites·54 claims
- 4545US8081253B2Zoom lens and image pickup apparatus equipped with sameICHIKAWA KEISUKE·Filed 2009·Granted Dec 20, 2011·0 cites·18 claims
- 4645US7403340B2Zoom optical system and electronic imaging apparatus using the sameOLYMPUS CORP·Filed 2007·Granted Jul 22, 2008·0 cites·11 claims
- 4744US9961140B2Information processing apparatus, information processing method, program, and information recording mediumSONY COMPUTER ENTERTAINMENT INC·Filed 2013·Granted May 1, 2018·0 cites·9 claims
- 4844US7965451B2Zoom lens and electronic imaging apparatus using the sameOLYMPUS IMAGING CORP·Filed 2008·Granted Jun 21, 2011·0 cites·38 claims
- 4943US7800832B2Image forming optical system and electronic image pickup apparatus using image forming optical systemOLYMPUS CORP·Filed 2006·Granted Sep 21, 2010·0 cites·11 claims
- 5043US7715108B2Image forming optical system and electronic image pickup apparatus using image forming optical systemOLYMPUS CORP·Filed 2006·Granted May 11, 2010·0 cites·11 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →