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Toyofumi Hasegawa
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Himeji, JP
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last 30 patents
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Patent Grant
Steel wire rod or bar with good cold deformability and machine part...
Patent number
6,217,678
Issue date
Apr 17, 2001
Kabushiki Kaisha Kobe Seiko Sho
Kan Momozaki
C21 - METALLURGY OF IRON
Information
Patent Grant
Outer ring for high strength constant velocity joint and production...
Patent number
5,803,993
Issue date
Sep 8, 1998
NTN Corporation
Kazuhiko Yoshida
C21 - METALLURGY OF IRON
Information
Patent Grant
High strength steel bolts
Patent number
5,073,338
Issue date
Dec 17, 1991
Kabushiki Kaisha Kobe Seiko Sho
Sadayoshi Furusawa
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Material for steel wool
Patent number
4,432,792
Issue date
Feb 21, 1984
Kabushiki Kaisha Kobe Seiko Sho
Heijiro Kawakami
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Warm forging method for cup-shaped pieces
Patent number
4,312,210
Issue date
Jan 26, 1982
Kobe Steel Limited
Masatoshi Nishizawa
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...