Katsuyoshi Tsukamoto

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Tokyo, JP

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Patents Grantslast 30 patents

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Pipeline structure with a lining material, an end structure of said...
- Patent number 5,857,494
- Issue date Jan 12, 1999
- Tokyo Gas Kabushiki Kaisha
- Katsuyoshi Tsukamoto
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL