Toshio Ajito

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Fukushima-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of purifying alkaline solution and method of etching semicon...
- Patent number 6,319,845
- Issue date Nov 20, 2001
- Shin-Etsu Handotai Co., Ltd.
- Isao Uchiyama
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method of purifying alkaline solution and method of etching semicon...
- Patent number 6,110,839
- Issue date Aug 29, 2000
- Shin-Etsu Handotai Co., Ltd.
- Masami Nakano
- C01 - INORGANIC CHEMISTRY