Yoshikazu Yamamichi

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Okayama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for production of spherical grain ferrite powder
- Patent number 4,352,717
- Issue date Oct 5, 1982
- Dowa Mining Co., Ltd.
- Yasuo Watanabe
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process and apparatus for production of spherical grain ferrite powder
- Patent number 4,226,843
- Issue date Oct 7, 1980
- Dowa Mining Co., Ltd.
- Yasuo Watanabe
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for carrying out air oxidation and for adding fine bubbles t...
- Patent number 4,152,409
- Issue date May 1, 1979
- Dowa Mining Co., Ltd.
- Jun-ichi Nagao
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the removal of sulfur oxide from waste gas
- Patent number RE29813
- Issue date Oct 24, 1978
- The Dowa-Mining Co., Ltd.
- Yoshikazu Yamamichi
- 423 - Chemistry of inorganic compounds
Information Patent Grant
Bubble forming device having no moving parts
- Patent number 4,101,286
- Issue date Jul 18, 1978
- Dowa Mining Co., Ltd.
- Jun-ichi Nagao
- C01 - INORGANIC CHEMISTRY