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Yoshimasa Okubo
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Nagoya, JP
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last 30 patents
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Patent Grant
Aluminum alloy impeller and manufacturing method of the same
Patent number
5,902,546
Issue date
May 11, 1999
Mitsubishi Heavy Industries, Ltd.
Nozomu Kawasetsu
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Patent Grant
Heat resistant aluminum alloy excellent in tensile strength, ductil...
Patent number
4,992,117
Issue date
Feb 12, 1991
Sumitomo Light Metal Industries, Ltd.
Yoshimasa Okubo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...