Nihon Tungsten Kabushiki Kaisha

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Fukuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Mechanical seal using pore-dispersed material, and pore-dispersed c...
- Patent number 4,997,192
- Issue date Mar 5, 1991
- Tanken Seiko Kabushiki Kaisha
- Yataro Nagai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Mechanical seal using pore-dispersed material, and pore-dispersed c...
- Patent number 4,925,490
- Issue date May 15, 1990
- Tanken Seiko Kabushiki Kaisha
- Yataro Nagai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES