Takeharu Yamamura

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Patents Grantslast 30 patents

Information Patent Grant
High purity gallium for preparation of compound semiconductor, and...
- Patent number 6,533,838
- Issue date Mar 18, 2003
- Dowa Mining Co., Ltd.
- Takeharu Yamamura
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
High purity gallium for producing compound semiconductor, refining...
- Publication number 20020162419
- Publication date Nov 7, 2002
- DOWA MINING CO., LTD.
- Takeharu Yamamura
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...