Hisao Ontsuga

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Tokyo, JP

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Patents Grantslast 30 patents

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Method for providing the inner surface of a pipe with a flexible tu...
- Patent number 4,368,091
- Issue date Jan 11, 1983
- Tokyo Gas Co. Ltd.
- Hisao Ontsuga
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL