Yuji Yoshii

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for making insoluble heavy metals contained in fly ash disch...
- Patent number 5,092,930
- Issue date Mar 3, 1992
- NKK Corporation
- Yoshinari Fujisawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for making insoluble heavy metals contained in fly ash disch...
- Patent number 5,092,931
- Issue date Mar 3, 1992
- NKK Corporation
- Yoshinari Fujisawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES