Sumihisa Kotani

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Hitachinaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing ferrous sintered alloy having quenched structure
- Patent number 5,682,588
- Issue date Oct 28, 1997
- Hitachi Powdered Metals Co., Ltd.
- Tadayuki Tsutsui
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...