Inventor
NAKAJIMA KAZUHIDE
JP45 patents
⚠️ This page may combine multiple inventors who share the name “NAKAJIMA KAZUHIDE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
36 patentsUS7228040B2Jun 5, 2007
Hole-assisted single mode optical fiber
NIPPON TELEGRAPH & TELEPHONE48 citations91
US10620372B2Apr 14, 2020
Alignment apparatus and alignment method
NIPPON TELEGRAPH & TELEPHONE14 citations82
US12158607B2Dec 3, 2024
Propagation mode loss difference compensator
NIPPON TELEGRAPH & TELEPHONE3 citations73
US11762144B2Sep 19, 2023
Multicore optical fiber and design method
NIPPON TELEGRAPH & TELEPHONE3 citations73
US12034487B2Jul 9, 2024
Optical transmission system
NIPPON TELEGRAPH & TELEPHONE2 citations72
US11366266B2Jun 21, 2022
Optical fiber and optical transmission system
NIPPON TELEGRAPH & TELEPHONE4 citations72
US10955622B2Mar 23, 2021
Connection device, optical connector manufacturing device, connection method, and method for manufacturing optical connector
NIPPON TELEGRAPH & TELEPHONE3 citations71
US12405418B2Sep 2, 2025
Multicore optical fiber, method of designing multicore optical fiber, and optical transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations62
US12181706B2Dec 31, 2024
Multi-core optical fiber and design method
NIPPON TELEGRAPH & TELEPHONE0 citations62
US12117645B2Oct 15, 2024
Multicore optical fiber and design method
NIPPON TELEGRAPH & TELEPHONE0 citations62
US11899237B2Feb 13, 2024
Multicore optical fiber, method of designing multicore optical fiber, and optical transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations62
US10782478B2Sep 22, 2020
Inter-mode loss difference compensator and optical amplifier
NIPPON TELEGRAPH & TELEPHONE1 citations62
US12586973B2Mar 24, 2026
Rare earth doped fiber and fiber optic amplifier
NIPPON TELEGRAPH & TELEPHONE0 citations61
US12411287B2Sep 9, 2025
Optical side input/output circuit and optical connector
NIPPON TELEGRAPH & TELEPHONE0 citations61
US12189178B2Jan 7, 2025
Optical fiber
NIPPON TELEGRAPH & TELEPHONE0 citations61
US12181707B2Dec 31, 2024
Multi-core optical fiber and design method
NIPPON TELEGRAPH & TELEPHONE0 citations61
US11474303B2Oct 18, 2022
Optical connector ferrule, sleeve, and method for manufacturing ferrule member
NIPPON TELEGRAPH & TELEPHONE1 citations61
US11815421B2Nov 14, 2023
Acoustic mode propagation speed measurement method and acoustic mode propagation speed measurement device
NIPPON TELEGRAPH & TELEPHONE0 citations60
US11156767B2Oct 26, 2021
Optical fiber and optical transmission system
NIPPON TELEGRAPH & TELEPHONE1 citations60
US10790905B2Sep 29, 2020
Optical fiber and optical transmission system
NIPPON TELEGRAPH & TELEPHONE1 citations60
US10705291B2Jul 7, 2020
Optical transmission system
NIPPON TELEGRAPH & TELEPHONE1 citations60
US12174413B2Dec 24, 2024
Long period fiber grating and optical transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations58
US10585235B2Mar 10, 2020
Optical connector
NIPPON TELEGRAPH & TELEPHONE2 citations57
US12203847B2Jan 21, 2025
Shape measurement system and shape measurement method
NIPPON TELEGRAPH & TELEPHONE0 citations56
US11956070B2Apr 9, 2024
Optical transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11454757B2Sep 27, 2022
Multi-core fiber connector
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11196227B2Dec 7, 2021
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10871648B2Dec 22, 2020
Optical fiber design method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10545333B2Jan 28, 2020
Photonic crystal fiber and high-power light transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10539784B2Jan 21, 2020
Photonic crystal fiber and high-power light transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US12352652B2Jul 8, 2025
Evaluation method and evaluation device for multi-core fiber
NIPPON TELEGRAPH & TELEPHONE0 citations50
US12085749B2Sep 10, 2024
Optical fiber evaluation device and optical fiber evaluation method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US12019267B2Jun 25, 2024
Multicore optical fiber and design method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11906783B2Feb 20, 2024
Core position grasping method, connection method, and connection device
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11722223B2Aug 8, 2023
Optical communication system and optical communication method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11860405B2Jan 2, 2024
Hole assisted optical fiber
NIPPON TELEGRAPH & TELEPHONE0 citations45