Tsutaru KUMAGAI

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Osaka-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical fiber connection component and optical fiber connection str...
- Patent number 12,158,619
- Issue date Dec 3, 2024
- Sumitomo Electric Industries, Ltd.
- Tetsuya Nakanishi
- G02 - OPTICS
Information Patent Grant
Optical fiber connection component and optical fiber connection str...
- Patent number 11,782,222
- Issue date Oct 10, 2023
- Sumitomo Electric Industries, Ltd.
- Tetsuya Nakanishi
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
BENT OPTICAL FIBER, METHOD FOR MANUFACTURING BENT OPTICAL FIBER, AN...
- Publication number 20250052947
- Publication date Feb 13, 2025
- Sumitomo Electric Industries, Ltd.
- Tsutaru KUMAGAI
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Application
OPTICAL WIRING COMPONENT, OPTICAL DEVICE, AND METHOD OF ASSEMBLING...
- Publication number 20240248269
- Publication date Jul 25, 2024
- Sumitomo Electric Industries, Ltd.
- Tsutaru KUMAGAI
- G02 - OPTICS
Information Patent Application
OPTICAL FIBER CONNECTION COMPONENT AND OPTICAL FIBER CONNECTION STR...
- Publication number 20230400644
- Publication date Dec 14, 2023
- Sumitomo Electric Industries, Ltd.
- Tetsuya NAKANISHI
- G02 - OPTICS
Information Patent Application
OPTICAL CONNECTION STRUCTURE
- Publication number 20230375792
- Publication date Nov 23, 2023
- Sumitomo Electric Industries, Ltd.
- Tsutaru KUMAGAI
- G02 - OPTICS
Information Patent Application
OPTICAL FIBER CONNECTION COMPONENT AND OPTICAL FIBER CONNECTION STR...
- Publication number 20220413229
- Publication date Dec 29, 2022
- Sumitomo Electric Industries, Ltd.
- Tetsuya NAKANISHI
- G02 - OPTICS
Information Patent Application
OPTICAL PATH CONVERSION COMPONENT-EQUIPPED CIRCUIT BOARD AND WIRING...
- Publication number 20220308295
- Publication date Sep 29, 2022
- Sumitomo Electric Industries, Ltd.
- Hong Chuyen NGUYEN
- G02 - OPTICS