Yoshihisa Koiwai

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing metal powder
- Patent number 4,437,883
- Issue date Mar 20, 1984
- Sumitomo Metal Industries, Ltd.
- Toshihiko Kubo
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for regenerating and recycling catalyst for oxidation of sul...
- Patent number 4,101,635
- Issue date Jul 18, 1978
- Nippon Oil Company Ltd.
- Masao Nambu
- C01 - INORGANIC CHEMISTRY