Masahisa Sonku

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Hikoheshi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Rehabilitating underground pipes with expanding helically wound liner
- Patent number 5,101,863
- Issue date Apr 7, 1992
- Rib Loc Australia Pty. Ltd.
- Shigeki Fujii
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of drilling a branch line aperture after internal lining of...
- Patent number 4,951,758
- Issue date Aug 28, 1990
- Sekisui Kagaku Kogo Kabushiki Kaisha
- Masahisa Sonku
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Anticorrosive liquid tank with offset lining joints
- Patent number 4,221,303
- Issue date Sep 9, 1980
- Sekisui Kagaku Kogyo Kabushiki Kaisha
- Yukio Yoshimura
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL