Inventor · disambiguated record
Katsuhiko Izumi
Also filed as: IZUMI KATSUHIKO
17 granted patents·11 pending applications·140 citations·filing 1990–2023
93Inventor score
Files withHITACHI-LG DATA STORAGE INC10HITACHI LTD8HITACHI MEDIA ELECTRON KK5IZUMI KATSUHIKO3KAWAMURA TOMOTO1
Top patents by PatentIndex Score
28 records- 0192US6567355B2Optical detector, optical pickup and optical information reproducing apparatus using optical pickupHITACHI LTD·Filed 2000·Granted May 20, 2003·31 cites·7 claims
- 0286US7706220B2Photodetector, diffraction grating, optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2006·Granted Apr 27, 2010·6 cites·11 claims
- 0383US10838063B2Distance measurement apparatus and angle adjustment method of the sameHITACHI LG DATA STORAGE INC·Filed 2018·Granted Nov 17, 2020·5 cites·3 claims
- 0482US6567352B1Objective lens driving device and optical disc apparatus using the sameHITACHI LTD·Filed 2000·Granted May 20, 2003·14 cites·28 claims
- 0577US6195314B1Objective lens driving device and optical disc apparatus using the sameHITACHI LTD·Filed 1997·Granted Feb 27, 2001·25 cites·10 claims
- 0676US6680883B2Objective lens driving device and optical disc apparatus using the sameHITACHI LTD·Filed 2003·Granted Jan 20, 2004·9 cites·19 claims
- 0775US6778475B2Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sourcesHITACHI LTD·Filed 2002·Granted Aug 17, 2004·8 cites·7 claims
- 0869US5982719ADisc auto changer for recording or reproducing information on a desired disc of a plurality of discs in a magazineHITACHI LTD·Filed 1996·Granted Nov 9, 1999·23 cites·2 claims
- 0968US10614584B2Three-dimensional distance measurement apparatusHITACHI LG DATA STORAGE INC·Filed 2018·Granted Apr 7, 2020·1 cites·5 claims
- 1064US2024159902A1Distance measurement device, distance correction method, and non-transitory computer-readable storage mediumHITACHI LG DATA STORAGE INC·Filed 2023·Application pending·0 cites
- 1159US2023044712A1Distance measurement system, distance measurement device, and distance measurement methodHITACHI LG DATA STORAGE INC·Filed 2022·Application pending·0 cites
- 1258US2022342049A1Distance measurement systemHITACHI LG DATA STORAGE INC·Filed 2022·Application pending·0 cites
- 1358US2022342050A1Distance measurement systemHITACHI LG DATA STORAGE INC·Filed 2022·Application pending·0 cites
- 1456US11604278B2Three-dimensional distance measurement deviceHITACHI LG DATA STORAGE INC·Filed 2020·Granted Mar 14, 2023·0 cites·4 claims
- 1556US5448427AMagnetic recording and reproducing apparatusHITACHI LTD·Filed 1990·Granted Sep 5, 1995·10 cites·3 claims
- 1654US8004956B2Optical disc drive, optical pickup and optical component used thereforHITACHI MEDIA ELECTRON KK·Filed 2008·Granted Aug 23, 2011·0 cites·8 claims
- 1753US7733759B2Optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2006·Granted Jun 8, 2010·0 cites·18 claims
- 1853US2021364613A1Distance measuring device and light emission diagnosis method for light sourceHITACHI LG DATA STORAGE INC·Filed 2021·Application pending·0 cites
- 1953US2023057554A1Distance measurement systemHITACHI LG DATA STORAGE INC·Filed 2022·Application pending·0 cites
- 2050US2022115910A1Power transmission and reception system, power reception device, and power transmission deviceHITACHI LG DATA STORAGE INC·Filed 2021·Application pending·0 cites
- 2149US2007286053A1Optical pickup and optical driveHITACHI MEDIA ELECTRON KK·Filed 2007·Application pending·0 cites
- 2248US7936658B2Photodetector, diffraction grating, optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2010·Granted May 3, 2011·0 cites·11 claims
- 2348US5608585AMagnetic recording and reproducing apparatus with repositioning stop modeHITACHI LTD·Filed 1995·Granted Mar 4, 1997·8 cites·15 claims
- 2447US8331207B2Optical pickup and optical disc unitIZUMI KATSUHIKO·Filed 2008·Granted Dec 11, 2012·0 cites·8 claims
- 2546US8094541B2Optical pickup and optical disc apparatusIZUMI KATSUHIKO·Filed 2008·Granted Jan 10, 2012·0 cites·6 claims
- 2645US2006193219A1Diffraction grating, optical pickup device, and optical disk apparatusKAWAMURA TOMOTO·Filed 2006·Application pending·0 cites
- 2745US2003080274A1Optical detector, optical pickup and optical information reproducing apparatus using optical pickupFiled 2002·Application pending·0 cites
- 2841US2007025207A1Optical pickup and optical disk apparatusIZUMI KATSUHIKO·Filed 2006·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →