Hiroaki Ohta

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical fiber drawing furnace with a zig zag heating element
- Patent number 6,546,760
- Issue date Apr 15, 2003
- Sumitomo Electric Industries, Ltd.
- Ichiro Tsuchiya
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method and furnace for drawing optical fibers
- Patent number 5,637,130
- Issue date Jun 10, 1997
- Sumitomo Electric Industries, Inc.
- Katsuya Nagayama
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Optical fiber preform manufacturing apparatus which measures a vert...
- Patent number 5,624,474
- Issue date Apr 29, 1997
- Sumitomo Electric Industries, Ltd.
- Ichiro Tsuchiya
- C03 - GLASS MINERAL OR SLAG WOOL