Inventor · disambiguated record
Hirofumi Kawaguchi
Also filed as: KAWAGUCHI HIROFUMI
44 granted patents·12 pending applications·432 citations·filing 1995–2025
97Inventor score
Files withNICHIA CORP14RENESAS ELECTRONICS CORP11MITA INDUSTRIAL CO LTD10PIONEER CORP7KYOCERA MITA CORP4
Top patents by PatentIndex Score
56 records- 0199US9373305B2Semiconductor device, image processing system and programRENESAS ELECTRONICS CORP·Filed 2015·Granted Jun 21, 2016·90 cites·18 claims
- 0291US9461210B2Light emitting element and light emitting device using the sameNICHIA CORP·Filed 2015·Granted Oct 4, 2016·6 cites·11 claims
- 0390US10417973B2Image processing device and image processing methodRENESAS ELECTRONICS CORP·Filed 2017·Granted Sep 17, 2019·4 cites·20 claims
- 0487US9876147B2Semiconductor light emitting element and method of manufacturing the sameNICHIA CORP·Filed 2016·Granted Jan 23, 2018·5 cites·20 claims
- 0586US9385280B2Semiconductor light emitting element and method of manufacturing the sameNICHIA CORP·Filed 2014·Granted Jul 5, 2016·4 cites·20 claims
- 0686US6022998AStilbene derivative and method for producing the sameMITA INDUSTRIAL CO LTD·Filed 1998·Granted Feb 8, 2000·37 cites·30 claims
- 0785US9805663B2Image processing device and image processing methodRENESAS ELECTRONICS CORP·Filed 2015·Granted Oct 31, 2017·3 cites·15 claims
- 0884US8294813B2Imaging device with a scene discriminatorKAWAGUCHI HIROFUMI·Filed 2008·Granted Oct 23, 2012·20 cites·20 claims
- 0984US6271891B1Video signal processing circuit providing optimum signal level for inverse gamma correctionPIONEER ELECTRONIC CORP·Filed 1999·Granted Aug 7, 2001·86 cites·5 claims
- 1083US9214010B2Image processing apparatus, image processing method, and program productRENESAS ELECTRONICS CORP·Filed 2012·Granted Dec 15, 2015·3 cites·23 claims
- 1182US6528645B1Titanyl phthalocyanine crystal and production method of the same, and electrophotosensitive material and production method of the sameKYOCERA MITA CORP·Filed 2000·Granted Mar 4, 2003·15 cites·14 claims
- 1281US5994012ANaphthoquinone derivative and electrophotosensitive material using sameMITA INDUSTRIAL CO LTD·Filed 1997·Granted Nov 30, 1999·19 cites·20 claims
- 1381US5863688ANaphthoquinone derivativeMITA INDUSTRIAL CO LTD·Filed 1996·Granted Jan 26, 1999·26 cites·21 claims
- 1479US9142187B2Semiconductor device, image processing system, and programRENESAS ELECTRONICS CORP·Filed 2013·Granted Sep 22, 2015·4 cites·19 claims
- 1578US6177220B1Stilbene derivative and method of producing the same, and electrophotosensitive materialKYOCERA MITA CORP·Filed 1999·Granted Jan 23, 2001·17 cites·13 claims
- 1676US10672945B2Method for manufacturing light emitting deviceNICHIA CORP·Filed 2018·Granted Jun 2, 2020·2 cites·20 claims
- 1776US2025287732A1Light emitting element manufacturing method and light emitting elementNICHIA CORP·Filed 2025·Application pending·0 cites
- 1875US10766405B2Semiconductor device and message image output methodRENESAS ELECTRONICS CORP·Filed 2019·Granted Sep 8, 2020·2 cites·20 claims
- 1968US6432595B1Single-layer type electrophotosensitive material and image forming apparatus using the sameKYOCERA MITA CORP·Filed 2000·Granted Aug 13, 2002·11 cites·9 claims
- 2067US8728843B2Nitride semiconductor light emitting element and method for manufacturing sameKAWAGUCHI HIROFUMI·Filed 2011·Granted May 20, 2014·1 cites·12 claims
- 2167US2025151471A1Method of manufacturing light emitting deviceNICHIA CORP·Filed 2024·Application pending·0 cites
- 2265US9530950B2Method of manufacturing nitride semiconductor light emitting element having thick metal bumpNICHIA CORP·Filed 2015·Granted Dec 27, 2016·1 cites·18 claims
- 2360US2024213038A1Method of manufacturing semiconductor elementNICHIA CORP·Filed 2023·Application pending·0 cites
- 2459US8174033B2Light emission device including semiconductor light emitting elementsYONEDA AKINORI·Filed 2008·Granted May 8, 2012·2 cites·27 claims
- 2556US10396249B2Semiconductor light emitting element and method of manufacturing the sameNICHIA CORP·Filed 2017·Granted Aug 27, 2019·0 cites·24 claims
- 2656US9818372B2Image processing apparatus, image processing method, and program productRENESAS ELECTRONICS CORP·Filed 2015·Granted Nov 14, 2017·0 cites·20 claims
- 2756US6090514AElectrophotographic photoreceptorMITA INDUSTRIAL CO LTD·Filed 1998·Granted Jul 18, 2000·12 cites·3 claims
- 2856US5911744ARefrigerating method and apparatus for showcases and vending machines as well as open type showcases and vending machines utilizing said method and apparatusNIHON TECHNO CO LTD·Filed 1997·Granted Jun 15, 1999·26 cites·13 claims
- 2955US12289935B2Method for manufacturing light-emitting elementNICHIA CORP·Filed 2022·Granted Apr 29, 2025·0 cites·19 claims
- 3054US9645532B2Fixing device and image forming apparatusKYOCERA DOCUMENT SOLUTIONS INC·Filed 2016·Granted May 9, 2017·0 cites·9 claims
- 3153US5773613ATryptoanthrinimine derivative and electrophotosensitive material using the sameMITA INDUSTRIAL CO LTD·Filed 1995·Granted Jun 30, 1998·11 cites·7 claims
- 3253US5514508AElectrophotosensitive materialMITA INDUSTRIAL CO LTD·Filed 1995·Granted May 7, 1996·11 cites·13 claims
- 3352US10804450B2Method of making layered structure with metal layers using resist patterns and electrolytic platingNICHIA CORP·Filed 2016·Granted Oct 13, 2020·0 cites·32 claims
- 3451US11094847B2Light-emitting device having gap portion between portion of insulating film and side surface of light-emitting layerNICHIA CORP·Filed 2019·Granted Aug 17, 2021·0 cites·10 claims
- 3550US11145093B2Semiconductor device, image processing system, image processing method and computer readable storage mediumRENESAS ELECTRONICS CORP·Filed 2019·Granted Oct 12, 2021·0 cites·20 claims
- 3650US7576714B2Display-panel driving methodPIONEER CORP·Filed 2005·Granted Aug 18, 2009·0 cites·7 claims
- 3748US11440466B2Semiconductor device and message image signal output methodRENESAS ELECTRONICS CORP·Filed 2019·Granted Sep 13, 2022·0 cites·19 claims
- 3848US9231159B2Method of manufacturing nitride semiconductor light emitting element having thick metal bumpYONEDA AKINORI·Filed 2012·Granted Jan 5, 2016·0 cites·27 claims
- 3948US5817810ATryptanthrine compoundsMITA INDUSTRIAL CO LTD·Filed 1996·Granted Oct 6, 1998·4 cites·3 claims
- 4048US2008066228A1Supporting apparatus and nursing robot systemKUME YOHEI·Filed 2007·Application pending·0 cites
- 4147US11508779B2Light emitting elementNICHIA CORP·Filed 2019·Granted Nov 22, 2022·0 cites·22 claims
- 4246US11094037B2Semiconductor device, image processing system, image processing method and computer readable storage mediumRENESAS ELECTRONICS CORP·Filed 2019·Granted Aug 17, 2021·0 cites·20 claims
- 4346US5616441ATryptoanthorine derivative contained in electrophotosensitive materialMITA INDUSTRIAL CO LTD·Filed 1995·Granted Apr 1, 1997·8 cites·8 claims
- 4443US2006220932A1Signal processing apparatus, signal processing method, and noise reducing apparatusPIONEER CORP·Filed 2006·Application pending·0 cites
- 4541US11173671B2Electric heating deviceFUJI IMPULSE CO LTD·Filed 2015·Granted Nov 16, 2021·0 cites·9 claims
- 4641US2006221241A1Image-quality adjusting apparatus, image-quality adjusting method, and display apparatusPIONEER CORP·Filed 2006·Application pending·0 cites
- 4741US2012182416A1Image projection system and semiconductor integrated circuitKAWAGUCHI HIROFUMI·Filed 2012·Application pending·0 cites
- 4841US2006221244A1Image-quality adjusting apparatus, image-quality adjusting method, and display apparatusPIONEER CORP·Filed 2006·Application pending·0 cites
- 4941US2019197730A1Semiconductor device, imaging system, and programRENESAS ELECTRONICS CORP·Filed 2018·Application pending·0 cites
- 5040US2006082684A1Video signal processing apparatusPIONEER CORP·Filed 2005·Application pending·0 cites
Showing the top 50 of 56 patent records by PatentIndex Score.
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