Takeshi Kobayashi

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Fukuyama City, JP

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Patents Grantslast 30 patents

Information Patent Grant
Aqueously-swelling water stopper and a process for stopping water t...
- Patent number 4,558,875
- Issue date Dec 17, 1985
- Hayakawa Rubber Co. Ltd.
- Hajime Yamaji
- E04 - BUILDING