Inventor · disambiguated record
Hirotaka Sakuma
Also filed as: SAKUMA HIROTAKA
35 granted patents·32 pending applications·76 citations·filing 2007–2025
95Inventor score
Files withSUMITOMO ELECTRIC INDUSTRIES38HITACHI CHEMICAL CO LTD10HITACHI LTD6SAKUMA HIROTAKA5ARATANI SUKEKAZU2
Top patents by PatentIndex Score
67 records- 0197US8319211B2Organic luminescent materials, coating solution using same for organic emitting layer, organic light emitting device using coating solution and light source device using organic light emitting deviceSAKUMA HIROTAKA·Filed 2010·Granted Nov 27, 2012·37 cites·27 claims
- 0294US8729536B2Organic luminescent materials, coating solution using same for organic emitting layer, organic light emitting device using coating solution and light source device using organic light emitting deviceHITACHI LTD·Filed 2012·Granted May 20, 2014·10 cites·27 claims
- 0392US9105856B2Organic luminescent materials, coating solution using same for organicHITACHI LTD·Filed 2014·Granted Aug 11, 2015·7 cites·30 claims
- 0486US9570717B2Organic luminescent materials, coating solution using same for organicHITACHI LTD·Filed 2015·Granted Feb 14, 2017·2 cites·32 claims
- 0582US10031282B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2017·Granted Jul 24, 2018·2 cites·4 claims
- 0681US10989864B2Optical fiber, coated optical fiber, and optical transmission systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Apr 27, 2021·1 cites·8 claims
- 0781US9496516B2Organic light-emitting element, light source device and method of manufacturing organic light-emitting elementSAKUMA HIROTAKA·Filed 2012·Granted Nov 15, 2016·5 cites·30 claims
- 0876US10550030B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Feb 4, 2020·2 cites·10 claims
- 0975US7786659B2Plasma display with a novel green-silicate phosphorHITACHI LTD·Filed 2008·Granted Aug 31, 2010·5 cites·15 claims
- 1074US10656326B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted May 19, 2020·1 cites·10 claims
- 1171US9306177B2Organic light-emitting layer material, coating liquid for use in forming organic light-emitting layer with organic material, organic light-emitting device produced with coating liquid, light source apparatus with organic light-emitting device, and methods for manufacture thereofHITACHI LTD·Filed 2013·Granted Apr 5, 2016·2 cites·10 claims
- 1269US12398062B2Method for producing optical fiber base material, and optical fiber base materialSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Aug 26, 2025·0 cites·7 claims
- 1369US10656329B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted May 19, 2020·0 cites·22 claims
- 1468US12466757B2Production method for optical fiber base material, and optical fiber base materialSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Nov 11, 2025·0 cites·12 claims
- 1568US9817184B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Nov 14, 2017·1 cites·10 claims
- 1666US11048040B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Jun 29, 2021·0 cites·19 claims
- 1766US9281489B2Organic luminescent materials, coating solution using organic luminescent materials for organic emitting layer, organic light emitting device using coating solution, light source device using organic light emitting device and method of organic light emitting deviceSAKUMA HIROTAKA·Filed 2010·Granted Mar 8, 2016·1 cites·14 claims
- 1865US2025147229A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 1964US2025327969A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 2064US2024402417A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 2162US11740404B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Aug 29, 2023·0 cites·10 claims
- 2262US11476421B2Organic electronics material and organic electronics elementHITACHI CHEMICAL CO LTD·Filed 2018·Granted Oct 18, 2022·0 cites·18 claims
- 2362US2020241198A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Application pending·0 cites
- 2461US2022317130A1Preanalysis Treatment Method for Sample, and Sample Pretreatment SystemHITACHI LTD·Filed 2022·Application pending·0 cites
- 2559US12216309B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Feb 4, 2025·0 cites·10 claims
- 2659US2024025789A1Glass rod manufacturing device and glass rod manufacturing methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 2759US2024361311A1Control slide glass for pathological examination and method for manufacturing sameHITACHI HIGH TECH CORP·Filed 2022·Application pending·0 cites
- 2858US2022009817A1Method for manufacturing optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 2957US2025258333A1Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2025·Application pending·0 cites
- 3056US11181684B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Nov 23, 2021·0 cites·20 claims
- 3155US11280958B2Optical fiber, colored optical fiber, and optical transmission systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted Mar 22, 2022·0 cites·11 claims
- 3254US12449589B2Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Oct 21, 2025·0 cites·1 claims
- 3354US12030804B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Jul 9, 2024·0 cites·8 claims
- 3453US11971571B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Apr 30, 2024·0 cites·14 claims
- 3553US2024327271A1Optical fiber and optical fiber base materialSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 3653US2019292089A1Optical fiber base material manufacturing method, optical fiber base material, and optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Application pending·0 cites
- 3752US2023104790A1Method for Evaluating Sample Containing Cell Support-Derived ComponentsSHOWA DENKO MATERIALS CO LTD·Filed 2020·Application pending·0 cites
- 3851US10723650B2Optical fiber preformSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted Jul 28, 2020·0 cites·10 claims
- 3951US2024275117A1Optical amplification transmission lineSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4050US2025076569A1Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4150US2025216595A1Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4249US11714226B2Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Aug 1, 2023·0 cites·14 claims
- 4349US2023266521A1Multicore optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2023·Application pending·0 cites
- 4448US8115388B2Plasma display deviceSAKUMA HIROTAKA·Filed 2008·Granted Feb 14, 2012·0 cites·19 claims
- 4547US11322904B2Optical amplifier and multi-core optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted May 3, 2022·0 cites·8 claims
- 4647US2024176063A1Multi-core optical fiber and core identification methodSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Application pending·0 cites
- 4746US2023333312A1Multicore optical fiber and optical transmission systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Application pending·0 cites
- 4846US2020400879A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Application pending·0 cites
- 4946US2020292750A1Optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Application pending·0 cites
- 5046US2008048547A1Plasma display device and light emitting deviceOAKU HITOSHI·Filed 2007·Application pending·0 cites
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →