Nobuhiko Ibaraki
16Patents
7h-index
42Co-inventors
62Inventor score
Filing activity: Dec 27, 1991 → Jul 22, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5776267A | Spring steel with excellent resistance to hydrogen embrittlement and fatigue | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5211772A | 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 | Textiles; Paper | 24 | Expired |
| US6372056B1 | Spring steel superior in workability | Chemistry; Metallurgy | 19 | Expired |
| US6322641A | High-carbon steel wire superior in resistance to longitudinal cracking, steel product for the same, and process for production of the same | Textiles; Paper | 18 | Expired |
| US6645319B2 | Wire rod for drawing superior in twisting characteristics and method for production thereof | Chemistry; Metallurgy | 11 | Expired |
| US5575866A | Hot rolled steel wire rod, fine steel wire and twisted steel wire | Textiles; Paper | 10 | Expired |
| US6800147B2 | High-strength steel wire excelling in resistance to strain aging embrittlement and longitudinal cracking, and method for production thereof | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7074282B2 | 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 | Chemistry; Metallurgy | 7 | Expired |
| US7615186B2 | Spring steel excellent in sag resistance and fatigue property | Chemistry; Metallurgy | 6 | Expired |
| US6206984A | Non-heat treated wire or bar steel for springs | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5873958A | High strength and high toughness steel wires and method for making the same | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6605166B2 | Method for manufacturing high strength bolt excellent in resistance to delayed fracture and to relaxation | Chemistry; Metallurgy | 5 | Expired |
| US7597768B2 | Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereof | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5762724A | High strength steel strand for prestressed concrete and method for manufacturing the same | Chemistry; Metallurgy | 2 | Expired |
| US7763123B2 | Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting | Emerging Cross-Sectional Technologies | 2 | Active |
| US8007716B2 | Steel wire for high strength spring excellent in workability and high strength | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.