Keiichi Wakayama

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing polyvinyl alcohol fibers
- Patent number 5,093,063
- Issue date Mar 3, 1992
- Unitika Ltd.
- Masaharu Watanabe
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Polyvinyl alcohol fiber and method of manufacture thereof
- Patent number 4,971,861
- Issue date Nov 20, 1990
- Unitika Ltd.
- Masaharu Watanabe
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING