Inventor
KAZUHIDE NAKAJIMA
Inventor
JP
Overview
Patents· 29 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus46%
H04BTransmission15%
G01MTesting static or dynamic balance of machines or structures8%
H04JMultiplex communication8%
G01BMeasuring length, thickness or similar linear dimensions6%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light6%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure4%
C03BManufacture, shaping, or supplementary processes2%
C03CChemical composition of glasses, glazes or vitreous enamels2%
G01NInvestigating or analysing materials by determining their chemical or physical properties2%
PatentTitleYear
12,586,973Rare earth doped fiber and fiber optic amplifier202612,498,516Optical fiber202512,467,805Apparatus and methods for calculating the behavior of linear structures202512,411,287Optical side input/output circuit and optical connector202512,405,418Multicore optical fiber, method of designing multicore optical fiber, and optical transmission method202512,352,652Evaluation method and evaluation device for multi-core fiber202512,203,847Shape measurement system and shape measurement method202512,189,178Optical fiber202512,181,707Multi-core optical fiber and design method202412,181,706Multi-core optical fiber and design method202412,174,413Long period fiber grating and optical transmission system202412,158,607Propagation mode loss difference compensator202412,117,645Multicore optical fiber and design method202412,085,749Optical fiber evaluation device and optical fiber evaluation method202412,034,487Optical transmission system202412,019,267Multicore optical fiber and design method202411,956,070Optical transmission system202411,906,783Core position grasping method, connection method, and connection device202411,899,237Multicore optical fiber, method of designing multicore optical fiber, and optical transmission method202411,860,405Hole assisted optical fiber202411,815,421Acoustic mode propagation speed measurement method and acoustic mode propagation speed measurement device202311,762,144Multicore optical fiber and design method202311,722,223Optical communication system and optical communication method202311,474,303Optical connector ferrule, sleeve, and method for manufacturing ferrule member202211,454,757Multi-core fiber connector202211,366,266Optical fiber and optical transmission system202211,237,322Optical fiber manufacturing method using relative bulk densities202211,196,227Optical amplifier202111,156,767Optical fiber and optical transmission system2021Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2021–2026Patents assigned to NIPPON TELEGRAPH & TELEPHONE (27)· patent assignee history
2021–2026Based in JP· patent location history
2022Patents assigned to FURUKAWA ELECTRIC CO LTD (1)· patent assignee history
2025–2026Patents assigned to NTT INC (3)· patent assignee history
2025Patents assigned to UNIV TOKYO (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 27 | 2021–2026 |
| NTT INC | 3 | 2025–2026 |
| UNIV TOKYO | 2 | 2025 |
| FURUKAWA ELECTRIC CO LTD | 1 | 2022 |
Locations
| Location | Patents | Span |
|---|---|---|
| JP | 29 | 2021–2026 |