Takumi Ujiro
35Patents
6h-index
42Co-inventors
65Inventor score
Filing activity: Aug 13, 1993 → Oct 12, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5851316A | Ferrite stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics and process for producing same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US9587297B2 | Ferritic stainless steel excellent in corrosion resistance and conductivity and method for manufacturing the same, separator of proton-exchange membrane fuel cell and proton-exchange membrane fuel cell | Emerging Cross-Sectional Technologies | 9 | Active |
| US6113710A | Ferritic stainless steel plate excellent in deep drawability and anti-ridging property and production method thereof | Chemistry; Metallurgy | 7 | Expired |
| US6383309B1 | Ferritic stainless steel plate | Chemistry; Metallurgy | 7 | Expired |
| US5505797A | Method of producing ferritic stainless steel strip with small intra-face anisotropy | Chemistry; Metallurgy | 6 | Expired |
| US5662864A | Fe-Cr alloy exhibiting excellent ridging resistance and surface characteristics | Chemistry; Metallurgy | 6 | Expired |
| US5709836A | Chromium steel sheets having an excellent press formability | Chemistry; Metallurgy | 5 | Expired |
| US8153055B2 | Ferritic stainless steel with excellent heat resistance | Chemistry; Metallurgy | 5 | Active |
| US8357247B2 | Martensitic stainless steel for disk brakes | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US8607941B2 | Steel sheet for brake disc, and brake disc | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US9279172B2 | Heat-resistance ferritic stainless steel | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8333849B2 | Low-carbon martensitic chromium-containing steel | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8440029B2 | Stainless steel having good conductivity and ductility for use in fuel cell and method for producing the same | Emerging Cross-Sectional Technologies | 3 | Active |
| US8852361B2 | Stainless steel sheet with excellent heat and corrosion resistances for brake disk | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US9157137B2 | Ferritic stainless steel excellent in oxidation resistance | Chemistry; Metallurgy | 3 | Active |
| US8152937B2 | Ferritic stainless steel sheet having superior sulfuric acid corrosion resistance and method for manufacturing the same | Chemistry; Metallurgy | 2 | Active |
| US9273382B2 | Stainless steel foil and catalyst carrier for exhaust gas purifying device using the foil | Emerging Cross-Sectional Technologies | 2 | Active |
| US5948181A | Hot-rolled stainless steel strip and method for producing the same | Chemistry; Metallurgy | 2 | Expired |
| US5350559A | Ferrite steel which excels in high-temperature strength and toughness | Chemistry; Metallurgy | 2 | Expired |
| USRE40950E1 | Ferritic stainless steel plate | General | 2 | Expired |
| US7819991B2 | Ferritic stainless steel sheet for raw material pipe for bellows pipe | Chemistry; Metallurgy | 2 | Expired |
| US6645324B2 | Method of manufacturing a ferritic stainless steel plate | Chemistry; Metallurgy | 2 | Expired |
| US6458221B1 | Ferritic stainless steel plate | Chemistry; Metallurgy | 2 | Expired |
| US7429302B2 | Stainless steel sheet for welded structural components and method for making the same | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7294212B2 | High-strength stainless steel material in the form of a wheel rim and method for manufacturing the same | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.