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Takaharu Yamamoto
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Hyogo, JP
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last 30 patents
Information
Patent Grant
Sintered hard metals and the method for producing the same
Patent number
4,973,355
Issue date
Nov 27, 1990
Sumitomo Electric Industries, Ltd.
Kunihiro Takahashi
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Hard alloy and a process for the production of the same
Patent number
4,290,807
Issue date
Sep 22, 1981
Sumitomo Electric Industries, Ltd.
Tsuyoshi Asai
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Sintered hard metal and the method for producing the same
Patent number
4,279,651
Issue date
Jul 21, 1981
Sumitomo Electric Industries, Ltd.
Naoji Fujimori
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Sintered hard metal and the method for producing the same
Patent number
4,277,283
Issue date
Jul 7, 1981
Sumitomo Electric Industries, Ltd.
Masaaki Tobioka
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Hard alloy containing molybdenum and tungsten
Patent number
4,265,662
Issue date
May 5, 1981
Sumitomo Electric Industries, Ltd.
Masaya Miyake
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Surface-coated sintered hard body
Patent number
4,239,536
Issue date
Dec 16, 1980
Sumitomo Electric Industries, Ltd.
Takaharu Yamamoto
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Process for producing sintered hard metals and an apparatus therefor
Patent number
4,225,344
Issue date
Sep 30, 1980
Sumitomo Electric Industries, Ltd.
Naoji Fujimori
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Method of making alloy and carbide powders of molybdenum and tungsten
Patent number
4,216,009
Issue date
Aug 5, 1980
Sumitomo Electric Industries, Ltd.
Masaya Miyake
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Process for the production of a hard solid solution
Patent number
4,216,034
Issue date
Aug 5, 1980
Sumitomo Electric Industries, Ltd.
Masaya Miyake
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Coated tool steel and machining tool formed therefrom
Patent number
4,169,913
Issue date
Oct 2, 1979
Sumitomo Electric Industries, Ltd.
Mitsunori Kobayashi
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Surface-coated cemented carbide article and a process for the produ...
Patent number
4,150,195
Issue date
Apr 17, 1979
Sumitomo Electric Industries, Ltd.
Masaaki Tobioka
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Cemented carbonitride alloys containing tantalum
Patent number
4,120,719
Issue date
Oct 17, 1978
Sumitomo Electric Industries, Ltd.
Toshio Nomura
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...