Yoshitaka Kubota

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Shin Nanyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
High-strength metal working tool made of a zirconia-type sintered m...
- Patent number 4,666,467
- Issue date May 19, 1987
- Toyo Soda Manufacturing Co., Ltd.
- Yoshihiro Matsumoto
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Process for preparing high-purity .alpha.-type silicon nitride
- Patent number 4,346,068
- Issue date Aug 24, 1982
- Toyo Soda Manufacturing Co., Ltd.
- Kiyoshi Kasai
- C01 - INORGANIC CHEMISTRY