Nihon Valqua Kogyo Kabushiki Kaisha

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Packing for use in steel-pipe hydraulic testing apparatus
- Patent number 4,149,731
- Issue date Apr 17, 1979
- Sumitomo Kinzoku Kogyo Kabushiki Kaisha
- Mitsuo Yoshida
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Packing for use in steel-pipe hydraulic testing apparatus
- Patent number 4,085,942
- Issue date Apr 25, 1978
- Sumitomo Kinzoku Kogyo Kabushiki Kaisha
- Mitsuo Yoshida
- G01 - MEASURING TESTING