Inventor

IBARAKI NOBUHIKO

JP16 patents

⚠️ This page may combine multiple inventors who share the name “IBARAKI NOBUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KOBE STEEL LTD

14 patents

US5776267AJul 7, 1998

Spring steel with excellent resistance to hydrogen embrittlement and fatigue

KOBE STEEL LTD68 citations94

US6645319B2Nov 11, 2003

Wire rod for drawing superior in twisting characteristics and method for production thereof

KOBE STEEL LTD19 citations92

US6372056B1Apr 16, 2002

Spring steel superior in workability

KOBE STEEL LTD34 citations92

US6322641B1Nov 27, 2001

High-carbon steel wire superior in resistance to longitudinal cracking, steel product for the same, and process for production of the same

KOBE STEEL LTD47 citations91

US5211772AMay 18, 1993

Wire rod for high strength and high toughness fine steel wire, high strength and high toughness fine steel wire, twisted products using the fine steel wires, and manufacture of the fine steel wire

KOBE STEEL LTD35 citations89

US5575866ANov 19, 1996

Hot rolled steel wire rod, fine steel wire and twisted steel wire

KOBE STEEL LTD29 citations88

US6800147B2Oct 5, 2004

High-strength steel wire excelling in resistance to strain aging embrittlement and longitudinal cracking, and method for production thereof

KOBE STEEL LTD18 citations83

US7615186B2Nov 10, 2009

Spring steel excellent in sag resistance and fatigue property

KOBE STEEL LTD11 citations82

US7597768B2Oct 6, 2009

Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereof

KOBE STEEL LTD10 citations82

US5873958AFeb 23, 1999

High strength and high toughness steel wires and method for making the same

KOBE STEEL LTD11 citations72

US6206984B1Mar 27, 2001

Non-heat treated wire or bar steel for springs

KOBE STEEL LTD14 citations71

US6605166B2Aug 12, 2003

Method for manufacturing high strength bolt excellent in resistance to delayed fracture and to relaxation

KOBE STEEL LTD11 citations68

US7763123B2Jul 27, 2010

Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting

KOBE STEEL LTD4 citations60

US8007716B2Aug 30, 2011

Steel wire for high strength spring excellent in workability and high strength

KOBE STEEL LTD1 citations46

SHINKO WIRE CO LTD

2 patents

US7074282B2Jul 11, 2006

Steel wire rod for hard drawn spring, drawn wire rod for hard drawn spring and hard drawn spring, and method for producing hard drawn spring

SHINKO WIRE CO LTD14 citations77

US5762724AJun 9, 1998

High strength steel strand for prestressed concrete and method for manufacturing the same

SHINKO WIRE CO LTD4 citations60