Ryoei Oka

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical fiber cable
- Patent number 11,029,477
- Issue date Jun 8, 2021
- Sumitomo Electric Industries, Ltd.
- Fumiaki Sato
- G02 - OPTICS
Information Patent Grant
Method of producing tape type optical fiber core wire
- Patent number 6,471,892
- Issue date Oct 29, 2002
- Sumitomo Electric Industries, Ltd.
- Ken Takahashi
- G02 - OPTICS
Information Patent Grant
Split type ribbon optical fiber core cable
- Patent number 6,028,976
- Issue date Feb 22, 2000
- Sumitomo Electric Industries, Ltd.
- Toshihisa Sato
- G02 - OPTICS
Information Patent Grant
Method of making optical fiber ribbon
- Patent number 5,945,173
- Issue date Aug 31, 1999
- Sumitomo Electric Industries, Ltd.
- Tomoyuki Hattori
- G02 - OPTICS
Information Patent Grant
Method for producing optical fiber ribbon
- Patent number 5,904,883
- Issue date May 18, 1999
- Sumitomo Electric Industries, Ltd.
- Tomoyuki Hattori
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL FIBER CABLE
- Publication number 20200225432
- Publication date Jul 16, 2020
- Sumitomo Electric Industries, Ltd.
- Hiroki ISHIKAWA
- G02 - OPTICS
Information Patent Application
OPTICAL FIBER CABLE
- Publication number 20200041739
- Publication date Feb 6, 2020
- Sumitomo Electric Industries, Ltd.
- Fumiaki SATO
- G02 - OPTICS