Inventor · disambiguated record
Ken Nakahara
Also filed as: NAKAHARA KEN
53 granted patents·42 pending applications·730 citations·filing 1999–2025
98Inventor score
Files withROHM CO LTD70NAKAHARA KEN11NAT INST OF ADVANCED IND SCIEN6SAKAI MITSUHIKO2FUJIMORI YOSHIKAZU1
Top patents by PatentIndex Score
95 records- 0197US9837521B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2013·Granted Dec 5, 2017·29 cites·39 claims
- 0295US8004006B2Nitride semiconductor light emitting elementROHM CO LTD·Filed 2006·Granted Aug 23, 2011·30 cites·4 claims
- 0395US6674098B1ZnO compound semiconductor light emitting elementNAT INST OF ADVANCED IND SCIEN·Filed 2000·Granted Jan 6, 2004·56 cites·7 claims
- 0494US7132691B1Semiconductor light-emitting device and method for manufacturing the sameROHM CO LTD·Filed 1999·Granted Nov 7, 2006·189 cites·45 claims
- 0592US10256335B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2017·Granted Apr 9, 2019·4 cites·32 claims
- 0691US11011970B2Gate drive circuitROHM CO LTD·Filed 2020·Granted May 18, 2021·3 cites·13 claims
- 0791US2025324647A1Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2025·Application pending·0 cites
- 0889US7781791B2Semiconductor light emitting elementROHM CO LTD·Filed 2007·Granted Aug 24, 2010·19 cites·6 claims
- 0987US12369346B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2023·Granted Jul 22, 2025·0 cites·29 claims
- 1087US8795184B2Wireless plethysmogram sensor unit, a processing unit for plethysmogram and a plethysmogram systemNIWA DAISUKE·Filed 2011·Granted Aug 5, 2014·45 cites·12 claims
- 1186US7960727B2Zinc oxide based compound semiconductor deviceROHM CO LTD·Filed 2006·Granted Jun 14, 2011·24 cites·5 claims
- 1286US7906791B2Semiconductor light emitting elementROHM CO LTD·Filed 2006·Granted Mar 15, 2011·11 cites·8 claims
- 1386US6735230B1Semiconductor luminous elements and semiconductor laserROHM CO LTD·Filed 1999·Granted May 11, 2004·87 cites·2 claims
- 1485US11482918B2Gate drive circuitROHM CO LTD·Filed 2018·Granted Oct 25, 2022·5 cites·14 claims
- 1585US7605012B2ZnO based compound semiconductor light emitting device and method for manufacturing the sameNAT INST OF ADVANCED IND SCIEN·Filed 2005·Granted Oct 20, 2009·7 cites·5 claims
- 1684US7582905B2Semiconductor light emitting deviceROHM CO LTD·Filed 2005·Granted Sep 1, 2009·11 cites·20 claims
- 1783US6569548B2Transparent conductive film of zinc oxideROHM CO LTD·Filed 2001·Granted May 27, 2003·32 cites·7 claims
- 1881US8053756B2Nitride semiconductor light emitting elementROHM CO LTD·Filed 2006·Granted Nov 8, 2011·9 cites·11 claims
- 1981US7741637B2ZnO-based semiconductor deviceROHM CO LTD·Filed 2007·Granted Jun 22, 2010·8 cites·4 claims
- 2081US6649434B2Method of manufacturing semiconductor device having ZnO based oxide semiconductor layerNAT INST OF ADVANCED IND SCIEN·Filed 2001·Granted Nov 18, 2003·27 cites·5 claims
- 2180US11990455B2Semiconductor deviceROHM CO LTD·Filed 2020·Granted May 21, 2024·1 cites·25 claims
- 2280US6638846B2Method of growing p-type ZnO based oxide semiconductor layer and method of manufacturing semiconductor light emitting deviceNAT INST OF ADVANCED IND SCIEN·Filed 2001·Granted Oct 28, 2003·34 cites·5 claims
- 2379US7872269B2Gallium nitride semiconductor light emitting elementROHM CO LTD·Filed 2006·Granted Jan 18, 2011·6 cites·2 claims
- 2477US11777024B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2021·Granted Oct 3, 2023·0 cites·31 claims
- 2577US8610133B2Photodetection deviceNAKAHARA KEN·Filed 2011·Granted Dec 17, 2013·4 cites·14 claims
- 2677US6987029B2ZnO based compound semiconductor light emitting device and method for manufacturing the sameROHM CO LTD·Filed 2003·Granted Jan 17, 2006·10 cites·5 claims
- 2776US7292382B2Light control unitROHM CO LTD·Filed 2006·Granted Nov 6, 2007·4 cites·15 claims
- 2874US10991818B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2020·Granted Apr 27, 2021·0 cites·16 claims
- 2973US8946727B2Zinc oxide based compound semiconductor deviceNAKAHARA KEN·Filed 2006·Granted Feb 3, 2015·4 cites·5 claims
- 3072US8975645B2Optical filterROHM CO LTD·Filed 2013·Granted Mar 10, 2015·2 cites·7 claims
- 3171US8304795B2Semiconductor light emitting device with concave-convex pattern and method for manufacturing the sameYAMAGUCHI ATSUSHI·Filed 2006·Granted Nov 6, 2012·4 cites·7 claims
- 3271US6531408B2Method for growing ZnO based oxide semiconductor layer and method for manufacturing semiconductor light emitting device using the sameNAT INST OF ADVANCED IND SCIEN·Filed 2001·Granted Mar 11, 2003·14 cites·8 claims
- 3369US11394288B2Negative voltage generation circuit and power conversion device using sameROHM CO LTD·Filed 2018·Granted Jul 19, 2022·2 cites·5 claims
- 3469US8247793B2ZnO-based thin film and ZnO-based semiconductor elementNAKAHARA KEN·Filed 2008·Granted Aug 21, 2012·3 cites·8 claims
- 3569US8124985B2Semiconductor light emitting device and method for manufacturing the sameSAKAI MITSUHIKO·Filed 2006·Granted Feb 28, 2012·4 cites·7 claims
- 3668US8049235B2Nitride semiconductor light emitting element with bragg reflection layers and anti-reflection layers to improve light extraction efficiencyROHM CO LTD·Filed 2007·Granted Nov 1, 2011·3 cites·3 claims
- 3768US2024418670A1Sensor systemROHM CO LTD·Filed 2024·Application pending·0 cites
- 3867US10686064B2Nitride semiconductor device and fabrication method thereforROHM CO LTD·Filed 2019·Granted Jun 16, 2020·0 cites·20 claims
- 3967US7196348B2GaN system semiconductor light emitting device excellent in light emission efficiency and light extracting efficiencyROHM CO LTD·Filed 2004·Granted Mar 27, 2007·14 cites·12 claims
- 4067US7002179B2ZnO system semiconductor deviceROHM CO LTD·Filed 2004·Granted Feb 21, 2006·10 cites·4 claims
- 4165US2022302262A1Nitride semiconductor deviceROHM CO LTD·Filed 2022·Application pending·0 cites
- 4264US9806824B2Wireless power supply receiver-transmitter device, wireless power supply receiver and wireless power supply transmitterROHM CO LTD·Filed 2013·Granted Oct 31, 2017·2 cites·23 claims
- 4363US8154036B2Nitride semiconductor deviceNAKAHARA KEN·Filed 2007·Granted Apr 10, 2012·2 cites·7 claims
- 4459US2022381725A1Carbon dioxide gas sensor and gas sensor elementROHM CO LTD·Filed 2022·Application pending·0 cites
- 4557US11393905B2Nitride semiconductor deviceROHM CO LTD·Filed 2018·Granted Jul 19, 2022·0 cites·18 claims
- 4657US2024284681A1Semiconductor deviceROHM CO LTD·Filed 2024·Application pending·0 cites
- 4756US6472241B2Radical cell device and method for manufacturing groups II-VI compound semiconductor deviceNAT INST OF ADVANCED IND SCIEN·Filed 2001·Granted Oct 29, 2002·7 cites·3 claims
- 4855US7948003B2Transparent electrodeROHM CO LTD·Filed 2008·Granted May 24, 2011·0 cites·16 claims
- 4955US6711198B1Light source device for laser beam printerROHM CO LTD·Filed 2000·Granted Mar 23, 2004·4 cites·14 claims
- 5054US2008187776A1Multilayer substrateROHM CO LTD·Filed 2008·Application pending·0 cites
Showing the top 50 of 95 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →