Akira Yorifuji
20Patents
8h-index
38Co-inventors
67Inventor score
Filing activity: Jan 31, 1997 → May 31, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6331216A | Steel pipe having high ductility and high strength and process for production thereof | Chemistry; Metallurgy | 25 | Expired |
| US6006789A | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Performing Operations; Transporting | 20 | Expired |
| US6749954B2 | Welded steel pipe having excellent hydroformability and method for making the same | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5859124A | Lubricant for use in hot work | Chemistry; Metallurgy | 12 | Expired |
| US6290789A | Ultrafine-grain steel pipe and process for manufacturing the same | Chemistry; Metallurgy | 11 | Expired |
| US5942132A | Method of and apparatus for producing steel pipes | Performing Operations; Transporting | 9 | Expired |
| US5983689A | Lubricant for use in hot work | Chemistry; Metallurgy | 9 | Expired |
| US6216511A | Apparatus and method for smoothing a welded seam of steel pipe | Performing Operations; Transporting | 9 | Expired |
| US6202463A | Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe | Performing Operations; Transporting | 6 | Expired |
| US6736910B2 | High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6375059B2 | Method for smoothing steel pipe seam portion | Performing Operations; Transporting | 3 | Expired |
| US6755919B2 | Stainless steel tube for automobile structure | Chemistry; Metallurgy | 3 | Expired |
| US5813962A | Forged roll for rolling a seamless steel pipe | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6505491B2 | Rolling mill and rolling-mill train | Performing Operations; Transporting | 2 | Expired |
| US6216520A | Rolling mill | Performing Operations; Transporting | 2 | Expired |
| US7018488B2 | Steel pipe for use in reinforcement of automobile and method for production thereof | Chemistry; Metallurgy | 2 | Expired |
| US6723453B2 | Welded steel pipe having excellent hydroformability and method for making the same | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6682829B2 | Welded steel pipe having excellent hydroformability and method for making the same | Emerging Cross-Sectional Technologies | 0 | Expired |
| US7591914B2 | High-workability steel pipe and method of producing same | Chemistry; Metallurgy | 0 | Expired |
| US5950310A | Forged roll for rolling a seamless steel pipe and manufacturing method of same | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.