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Kunihiko Yoshikawa
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Suita, JP
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Patents Grants
last 30 patents
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Patent Grant
Austenitic steel having improved high-temperature strength and corr...
Patent number
4,842,823
Issue date
Jun 27, 1989
Sumitomo Metal Industries, Ltd.
Yoshiatsu Sawaragi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for producing a high strength high-Cr ferritic heat-resista...
Patent number
4,799,972
Issue date
Jan 24, 1989
Sumitomo Metal Industries, Ltd.
Fujimitsu Masuyama
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Precipitation-hardening nickel-base alloy and method of producing same
Patent number
4,652,315
Issue date
Mar 24, 1987
Sumitomo Metal Industries, Ltd.
Masaaki Igarashi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for making high strength deep well casing and tubing having...
Patent number
4,421,571
Issue date
Dec 20, 1983
Sumitomo Metal Industries, Ltd.
Takeo Kudo
C21 - METALLURGY OF IRON
Information
Patent Grant
Alloy for making high strength deep well casing and tubing having i...
Patent number
4,400,349
Issue date
Aug 23, 1983
Sumitomo Metal Industries, Ltd.
Takeo Kudo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Alloy for making high strength deep well casing and tubing having i...
Patent number
4,400,209
Issue date
Aug 23, 1983
Sumitomo Metal Industries, Ltd.
Takeo Kudo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Alloy for making high strength deep well casing and tubing having i...
Patent number
4,400,210
Issue date
Aug 23, 1983
Sumitomo Metal Industries, Ltd.
Takeo Kudo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Alloy for making high strength deep well casing and tubing having i...
Patent number
4,400,211
Issue date
Aug 23, 1983
Sumitomo Metal Industries, Ltd.
Takeo Kudo
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...