Riki Okamoto
55Patents
4h-index
69Co-inventors
69Inventor score
Filing activity: Jul 6, 1999 → Apr 15, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6544354B1 | High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof | Chemistry; Metallurgy | 18 | Expired |
| US8951366B2 | High-strength cold-rolled steel sheet and method of manufacturing thereof | Chemistry; Metallurgy | 16 | Active |
| US6319338A | High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same | Chemistry; Metallurgy | 12 | Expired |
| US7780799B2 | Cold-rolled steel sheet having a tensile strength of 780 MPA or more, an excellent local formability and a suppressed increase in weld hardness | Emerging Cross-Sectional Technologies | 6 | Expired |
| US9546413B2 | Hot-rolled steel sheet and production method thereof | Chemistry; Metallurgy | 4 | Active |
| US7828912B2 | High-strength hot-rolled steel shaft excellent in hole expandability and ductility and production method thereof | Emerging Cross-Sectional Technologies | 3 | Expired |
| US9512508B2 | High-strength cold-rolled steel sheet having excellent stretch flangeability and precision punchability and manufacturing method thereof | Emerging Cross-Sectional Technologies | 3 | Active |
| US7938917B2 | Method for controlling cooling of steel sheet | Chemistry; Metallurgy | 3 | Active |
| US7501031B2 | Steel sheet for tin plated steel sheet and tin-free steel sheet each having excellent formability and manufacturing method thereof | Chemistry; Metallurgy | 3 | Expired |
| US9410231B2 | Steel sheet and method of manufacturing steel sheet | Chemistry; Metallurgy | 2 | Active |
| US9567658B2 | Cold-rolled steel sheet | Emerging Cross-Sectional Technologies | 2 | Active |
| US10060006B2 | High-strength cold-rolled steel sheet having excellent local deformability | Emerging Cross-Sectional Technologies | 2 | Active |
| US10384251B2 | Burring processing method | Performing Operations; Transporting | 2 | Active |
| US7780797B2 | High strength thin steel excellent in hole expansibility, ductility and chemical treatment characteristics | Chemistry; Metallurgy | 2 | Expired |
| US10066283B2 | High-strength cold-rolled steel sheet having excellent uniform elongation and hole expandability | Emerging Cross-Sectional Technologies | 2 | Active |
| US9752217B2 | Hot-rolled steel sheet and method of producing the same | Chemistry; Metallurgy | 2 | Active |
| US9988697B2 | High-strength hot-rolled steel sheet having excellent local deformability and manufacturing method thereof | Emerging Cross-Sectional Technologies | 1 | Active |
| US10167539B2 | Hot-rolled steel sheet and method for producing same | Emerging Cross-Sectional Technologies | 1 | Active |
| US11377710B2 | Steel sheet and manufacturing method therefor | Emerging Cross-Sectional Technologies | 1 | Active |
| US9587319B2 | Hot-rolled steel sheet, cold-rolled steel sheet, galvanized steel sheet, and methods of manufacturing the same | Chemistry; Metallurgy | 1 | Active |
| US9458520B2 | Manufacturing method of a high-strength cold-rolled steel sheet having excellent uniform elongation and hole expandability | Emerging Cross-Sectional Technologies | 1 | Active |
| US10858719B2 | Steel sheet | Emerging Cross-Sectional Technologies | 1 | Active |
| US9797024B2 | Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereof | Chemistry; Metallurgy | 1 | Active |
| US9453269B2 | Hot-rolled steel sheet for gas nitrocarburizing and manufacturing method thereof | Chemistry; Metallurgy | 1 | Active |
| US11447848B2 | Steel sheet and manufacturing method of therefor | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.