Inventor · disambiguated record
Kazuhide Nakajima
Also filed as: NAKAJIMA KAZUHIDE
44 granted patents·49 pending applications·90 citations·filing 2003–2025
96Inventor score
Top patents by PatentIndex Score
93 records- 0193US11762144B2Multicore optical fiber and design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Sep 19, 2023·3 cites·8 claims
- 0290US12158607B2Propagation mode loss difference compensatorNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 3, 2024·3 cites·11 claims
- 0390US10620372B2Alignment apparatus and alignment methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Apr 14, 2020·14 cites·14 claims
- 0489US7228040B2Hole-assisted single mode optical fiberNIPPON TELEGRAPH & TELEPHONE·Filed 2004·Granted Jun 5, 2007·48 cites·3 claims
- 0586US2025362445A1Multicore optical fiber, method of designing multicore optical fiber, and optical transmission methodNTT INC·Filed 2025·Application pending·0 cites
- 0681US11366266B2Optical fiber and optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2018·Granted Jun 21, 2022·4 cites·7 claims
- 0781US2024427078A1Multicore optical fiber and design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2024·Application pending·0 cites
- 0880US12117645B2Multicore optical fiber and design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2023·Granted Oct 15, 2024·0 cites·7 claims
- 0979US12405418B2Multicore optical fiber, method of designing multicore optical fiber, and optical transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2023·Granted Sep 2, 2025·0 cites·9 claims
- 1079US10955622B2Connection device, optical connector manufacturing device, connection method, and method for manufacturing optical connectorNIPPON TELEGRAPH & TELEPHONE·Filed 2018·Granted Mar 23, 2021·3 cites·27 claims
- 1176US12034487B2Optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jul 9, 2024·2 cites·4 claims
- 1271US11474303B2Optical connector ferrule, sleeve, and method for manufacturing ferrule memberNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Oct 18, 2022·1 cites·7 claims
- 1369US10585235B2Optical connectorNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Mar 10, 2020·2 cites·7 claims
- 1468US10790905B2Optical fiber and optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Sep 29, 2020·1 cites·4 claims
- 1568US10782478B2Inter-mode loss difference compensator and optical amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Sep 22, 2020·1 cites·4 claims
- 1667US9075185B2Hole-assisted optical fiberFURUKAWA ELECTRIC CO LTD·Filed 2013·Granted Jul 7, 2015·2 cites·3 claims
- 1766US11156767B2Optical fiber and optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2018·Granted Oct 26, 2021·1 cites·11 claims
- 1866US9252872B2Crosstalk measuring method and crosstalk measuring deviceFUJIKURA LTD·Filed 2013·Granted Feb 2, 2016·2 cites·20 claims
- 1963US11815421B2Acoustic mode propagation speed measurement method and acoustic mode propagation speed measurement deviceNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Nov 14, 2023·0 cites·4 claims
- 2063US10705291B2Optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2017·Granted Jul 7, 2020·1 cites·9 claims
- 2163US8181487B2Optical fiber preform manufacturing methodSUGIZAKI RYUICHI·Filed 2010·Granted May 22, 2012·1 cites·7 claims
- 2262US10539784B2Photonic crystal fiber and high-power light transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jan 21, 2020·0 cites·4 claims
- 2361US11899237B2Multicore optical fiber, method of designing multicore optical fiber, and optical transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Feb 13, 2024·0 cites·9 claims
- 2458US12189178B2Optical fiberNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jan 7, 2025·0 cites·2 claims
- 2557US12203847B2Shape measurement system and shape measurement methodNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Granted Jan 21, 2025·0 cites·14 claims
- 2657US12181706B2Multi-core optical fiber and design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 31, 2024·0 cites·6 claims
- 2757US12181707B2Multi-core optical fiber and design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 31, 2024·0 cites·7 claims
- 2856US12411287B2Optical side input/output circuit and optical connectorNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Sep 9, 2025·0 cites·4 claims
- 2956US2024418073A1Control system and control methodNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 3056US2025392396A1System and method for optical communication using power feeding lightNIPPON TELEGRAPH & TELEPHONE·Filed 2023·Application pending·0 cites
- 3155US12467805B2Apparatus and methods for calculating the behavior of linear structuresNTT INC·Filed 2021·Granted Nov 11, 2025·0 cites·6 claims
- 3255US12174413B2Long period fiber grating and optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Dec 24, 2024·0 cites·4 claims
- 3355US10871648B2Optical fiber design methodNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Dec 22, 2020·0 cites·1 claims
- 3455US2024072507A1Fiber optic amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 3555US2024335578A1Ultraviolet light irradiation system and control methodNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 3654US10545333B2Photonic crystal fiber and high-power light transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2016·Granted Jan 28, 2020·0 cites·6 claims
- 3754US2025141174A1Optical amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 3854US2024375093A1Photocatalyst sheetNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 3954US2025105578A1Optical fiber for amplification, optical amplifier, and method for controlling optical amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 4054US2025118941A1Rare-earth doped fiber, optical amplifier, and method for controlling optical amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 4153US2025001036A1Air conditioning equipmentNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 4252US12352652B2Evaluation method and evaluation device for multi-core fiberNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Granted Jul 8, 2025·0 cites·4 claims
- 4352US8702317B2Optical connector and method for assembling sameKOYAMA RYO·Filed 2010·Granted Apr 22, 2014·1 cites·17 claims
- 4452US2025060213A1Shape measurement system and shape measurement methodNIPPON TELEGRAPH & TELEPHONE·Filed 2022·Application pending·0 cites
- 4551US2024216559A1Ultraviolet light irradiation system and ultraviolet light irradiation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 4651US2025210929A1Fiber amplifierNIPPON TELEGRAPH AND TELEPHONE CORPORTION·Filed 2022·Application pending·0 cites
- 4750US2024157003A1Ultraviolet light irradiation system and ultraviolet light irradiation methodNIPPON TELEGRAPH & TELEPHONE·Filed 2021·Application pending·0 cites
- 4850US2023310674A1Light irradiation systemNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Application pending·0 cites
- 4950US2023293741A1Ultraviolet light irradiation system and decontamination methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Application pending·0 cites
- 5050US2023270898A1Ultraviolet light irradiation system and decontamination methodNIPPON TELEGRAPH & TELEPHONE·Filed 2020·Application pending·0 cites
Showing the top 50 of 93 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →