Koki Ohtsuka

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Mouka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Heat-resistant cast steel, method of producing same, and exhaust eq...
- Patent number 5,201,965
- Issue date Apr 13, 1993
- Hitachi Metals, Ltd.
- Koki Ohtsuka
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...