Inventor · disambiguated record
Hiroki Yoshikawa
Also filed as: YOSHIKAWA HIROKI
113 granted patents·31 pending applications·1,338 citations·filing 1985–2024
99Inventor score
Top patents by PatentIndex Score
144 records- 0196US7767366B2Photomask blank and photomaskSHINETSU CHEMICAL CO·Filed 2007·Granted Aug 3, 2010·34 cites·23 claims
- 0295US8012654B2Photomask blank and photomaskSHINETSU CHEMICAL CO·Filed 2010·Granted Sep 6, 2011·11 cites·22 claims
- 0395US7771893B2Photomask blank, photomask and fabrication method thereofSHINETSU CHEMICAL CO·Filed 2006·Granted Aug 10, 2010·28 cites·20 claims
- 0495US6130786AProjection lens and image display deviceHITACHI LTD·Filed 1999·Granted Oct 10, 2000·125 cites·4 claims
- 0595US5590943ARear projection type image display apparatus and transmission type screen used thereinHITACHI LTD·Filed 1993·Granted Jan 7, 1997·49 cites·54 claims
- 0695US5513037ARear-projection screen and a rear projection image display employing the rear-projection screenHITACHI LTD·Filed 1994·Granted Apr 30, 1996·47 cites·6 claims
- 0795US5066099ARear projection screen and method of producing the sameHITACHI LTD·Filed 1990·Granted Nov 19, 1991·136 cites·24 claims
- 0894US8003284B2Photomask blank and photomaskSHINETSU CHEMICAL CO·Filed 2010·Granted Aug 23, 2011·9 cites·23 claims
- 0994US7245429B2Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheetHITACHI LTD·Filed 2006·Granted Jul 17, 2007·20 cites·5 claims
- 1094US5613748ARear projection type image display apparatus and transmission type screen used thereinHITACHI LTD·Filed 1996·Granted Mar 25, 1997·48 cites·19 claims
- 1193US7535648B2Projection type image displayHITACHI LTD·Filed 2006·Granted May 19, 2009·20 cites·9 claims
- 1293US7514185B2Preparation of photomask blank and photomaskSHIN ESTU CHEMICAL CO LTD·Filed 2005·Granted Apr 7, 2009·18 cites·17 claims
- 1393US5485308ARear-projection type image display apparatus and rear-projection type screenHITACHI LTD·Filed 1995·Granted Jan 16, 1996·70 cites·23 claims
- 1492US7736824B2Photomask blank, photomask, and method of manufactureSHINETSU CHEMICAL CO·Filed 2007·Granted Jun 15, 2010·26 cites·11 claims
- 1592US5400114ARear-projection screen and a rear projection image display employing the rear-projection screenHITACHI LTD·Filed 1992·Granted Mar 21, 1995·36 cites·37 claims
- 1690US7989124B2Photomask blank and photomask making methodTOPPAN PRINTING CO LTD·Filed 2010·Granted Aug 2, 2011·6 cites·19 claims
- 1789US7767367B2Photomask blank and photomask making methodTOPPAN PRINTING CO LTD·Filed 2007·Granted Aug 3, 2010·10 cites·35 claims
- 1889US7691546B2Photomask blank and photomaskSHINETSU CHEMICAL CO·Filed 2005·Granted Apr 6, 2010·10 cites·8 claims
- 1987US7625676B2Photomask blank, photomask and fabrication method thereofSHINETSU CHEMICAL CO·Filed 2005·Granted Dec 1, 2009·13 cites·24 claims
- 2087US5833340ASensory integration system and image display device and concave mirror for use in the same systemHITACHI LTD·Filed 1995·Granted Nov 10, 1998·27 cites·49 claims
- 2186US10529984B2Negative electrode material for non-aqueous electrolyte secondary battery and method of producing negative electrode active material particlesSHINETSU CHEMICAL CO·Filed 2015·Granted Jan 7, 2020·2 cites·15 claims
- 2286US7790339B2Photomask blankSHINETSU CHEMICAL CO·Filed 2007·Granted Sep 7, 2010·8 cites·7 claims
- 2386US7618753B2Photomask blank, photomask and method for producing thoseSHINETSU CHEMICAL CO·Filed 2005·Granted Nov 17, 2009·8 cites·20 claims
- 2486US7586687B2Projecting optical unit and projecting type image display apparatus therewithHITACHI LTD·Filed 2005·Granted Sep 8, 2009·12 cites·11 claims
- 2586US7467872B2Projection optical unit and projection type video display device using the unitHITACHI LTD·Filed 2005·Granted Dec 23, 2008·16 cites·9 claims
- 2686US5808704ARear projection type image display apparatusHITACHI LTD·Filed 1995·Granted Sep 15, 1998·33 cites·13 claims
- 2783US8148036B2Photomask blank and photomaskINAZUKI YUKIO·Filed 2010·Granted Apr 3, 2012·4 cites·4 claims
- 2883US7460301B2Image display apparatus, and transmissive screen and reflecting mirror used for sameHITACHI LTD·Filed 2005·Granted Dec 2, 2008·8 cites·4 claims
- 2982US9893353B2Negative electrode material for nonaqueous electrolyte secondary batteries, and secondary batterySHINETSU CHEMICAL CO·Filed 2014·Granted Feb 13, 2018·2 cites·1 claims
- 3082US7767368B2Method of fabricating photomask blankSHINETSU CHEMICAL CO·Filed 2007·Granted Aug 3, 2010·6 cites·20 claims
- 3179US9488907B2Photomask blank, process for production of photomask, and chromium-containing material filmSHINETSU CHEMICAL CO·Filed 2015·Granted Nov 8, 2016·1 cites·19 claims
- 3279US5926153AMulti-display apparatusHITACHI LTD·Filed 1996·Granted Jul 20, 1999·93 cites·23 claims
- 3378US7670007B2Projection display, projection optical system and transmission lens or free curved lensHITACHI LTD·Filed 2006·Granted Mar 2, 2010·8 cites·17 claims
- 3478US4638643AControl system for compressor motor used with air-conditioning unitHITACHI LTD·Filed 1985·Granted Jan 27, 1987·51 cites·8 claims
- 3577US9929399B2Negative electrode active material, method for producing a negative electrode active material, and lithium ion secondary batterySHINETSU CHEMICAL CO·Filed 2014·Granted Mar 27, 2018·1 cites·17 claims
- 3677US8007964B2Photomask blank and photomaskSHINETSU CHEMICAL CO·Filed 2010·Granted Aug 30, 2011·2 cites·17 claims
- 3776US6462794B1Image forming unit, enlarging unit, optical parts, and image display apparatus having these componentsHITACHI LTD·Filed 1999·Granted Oct 8, 2002·46 cites·34 claims
- 3875US10069142B2Rotary tubular furnace, method of producing negative electrode active material for non-aqueous electrolyte secondary battery, negative electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary batterySHINETSU CHEMICAL CO·Filed 2015·Granted Sep 4, 2018·1 cites·18 claims
- 3975US5103302AOptical system for projection type image display deviceHITACHI LTD·Filed 1990·Granted Apr 7, 1992·39 cites·28 claims
- 4074US10396351B2Negative electrode material for non-aqueous electrolyte secondary battery and method of producing negative electrode active material particlesSHINETSU CHEMICAL CO·Filed 2014·Granted Aug 27, 2019·1 cites·20 claims
- 4174US9831495B2Negative electrode active material for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method of producing negative electrode material for a non-aqueous electrolyte secondary batterySHINETSU CHEMICAL CO·Filed 2016·Granted Nov 28, 2017·1 cites·22 claims
- 4274US8841048B2Photomask blank, photomask, and making methodINAZUKI YUKIO·Filed 2012·Granted Sep 23, 2014·3 cites·18 claims
- 4373US7622227B2Phase-shift photomask-blank, phase-shift photomask and fabrication method thereofSHINETSU CHEMICAL CO·Filed 2006·Granted Nov 24, 2009·3 cites·20 claims
- 4473US7261421B2Optical projector and image display apparatus using the sameHITACHI LTD·Filed 2004·Granted Aug 28, 2007·8 cites·19 claims
- 4573US5659424AProjecting lens and image display deviceHITACHI LTD·Filed 1994·Granted Aug 19, 1997·29 cites·28 claims
- 4672US9812300B2Silicon target for sputtering film formation and method for forming silicon-containing thin filmSHINETSU CHEMICAL CO·Filed 2014·Granted Nov 7, 2017·0 cites·9 claims
- 4772US8475978B2Photomask blank and making method, photomask, light pattern exposure method, and design method of transition metal/silicon base material filmYOSHIKAWA HIROKI·Filed 2011·Granted Jul 2, 2013·2 cites·16 claims
- 4872US7556892B2Halftone phase shift mask blank, halftone phase shift mask, and pattern transfer methodSHINETSU CHEMICAL CO·Filed 2005·Granted Jul 7, 2009·3 cites·28 claims
- 4972US5272540ATemperature compensating lens system for projection televisionHITACHI LTD·Filed 1991·Granted Dec 21, 1993·37 cites·58 claims
- 5071US8920666B2Etching method and photomask blank processing methodIGARASHI SHINICHI·Filed 2010·Granted Dec 30, 2014·3 cites·12 claims
Showing the top 50 of 144 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Hiroki Yoshikawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →