Inventor
TAKEMI HASEGAWA
Inventor
JP
Overview
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus52%
C03BManufacture, shaping, or supplementary processes10%
C03CChemical composition of glasses, glazes or vitreous enamels10%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light10%
G01MTesting static or dynamic balance of machines or structures6%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein6%
H04BTransmission3%
H04JMultiplex communication3%
PatentTitleYear
12,546,933Multicore optical fiber202612,498,518Optical fiber202512,449,589Multicore optical fiber202512,204,140Gain flattening filter, and method for manufacturing gain flattening filter202512,164,145Optical fiber and method for producing optical fiber202411,841,529Optical fiber and optical cable202311,774,672Optical fiber202311,754,466Mode-dependent loss measurement device and mode-dependent loss measuring method202311,493,690Optical fiber line, module, and method for manufacturing optical fiber line202211,467,340Optical fiber202211,448,821Slant-type fiber grating202211,366,267Optical fiber202211,322,904Optical amplifier and multi-core optical fiber202211,316,316Optical amplifier and multi-core optical fiber202211,156,529Nonlinearity measuring method and nonlinearity measuring device202111,137,542Optical fiber2021Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2021–2026Patents assigned to SUMITOMO ELECTRIC INDUSTRIES (16)· patent assignee history
2021–2026Based in JP· patent location history
2025Patents assigned to SUMITOMO ELECTRIC OPTIFRONTIER CO LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SUMITOMO ELECTRIC INDUSTRIES | 16 | 2021–2026 |
| SUMITOMO ELECTRIC OPTIFRONTIER CO LTD | 1 | 2025 |
Locations
| Location | Patents | Span |
|---|---|---|
| JP | 16 | 2021–2026 |