Yoshiaki Koinuma

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for forming porous preform used to fabricate optical fiber
- Patent number 5,318,432
- Issue date Jun 7, 1994
- The Furukawa Electric Co., Ltd.
- Takeshi Yagi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for manufacturing optical fiber preform
- Patent number 5,314,520
- Issue date May 24, 1994
- The Furukawa Electric Co., Ltd.
- Takeshi Yagi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL