Naoki Yoshinaga
35Patents
7h-index
49Co-inventors
69Inventor score
Filing activity: Jun 21, 1990 → Oct 18, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6632296B2 | Steel pipe having high formability and method for producing the same | Emerging Cross-Sectional Technologies | 35 | Expired |
| US9658916B2 | System analysis device, system analysis method and system analysis program | Physics | 30 | Active |
| US5470403A | Cold rolled steel sheet and hot dip zinc-coated cold rolled steel sheet having excellent bake hardenability, non-aging properties and formability, and process for producing same | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6706419B2 | Cold-rolled steel sheet or hot-rolled steel sheet excellent in painting bake hardenability and anti aging property at room temperature, and method of producing the same | Emerging Cross-Sectional Technologies | 16 | Expired |
| US8951366B2 | High-strength cold-rolled steel sheet and method of manufacturing thereof | Chemistry; Metallurgy | 16 | Active |
| US5690755A | Cold-rolled steel sheet and hot-dip galvanized cold-rolled steel sheet having excellent bake hardenability, non-aging properties at room temperature and good formability and process for producing the same | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7534312B2 | Steel plate exhibiting excellent workability and method for producing the same | Chemistry; Metallurgy | 15 | Expired |
| US8460481B2 | High-strength steel sheet and galvanized steel sheet having very good balance between hole expansibility and ductility, and also excellent in fatigue resistance, and methods of producing the steel sheets | Chemistry; Metallurgy | 7 | Active |
| US5074924A | Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line | Chemistry; Metallurgy | 7 | Expired |
| US6962631B2 | Steel plate excellent in shape freezing property and method for production thereof | Chemistry; Metallurgy | 6 | Expired |
| US5486241A | Non-aging at room temperature ferritic single-phase cold-rolled steel sheet and hot-dip galvanized steel sheet for deep drawing having excellent fabrication embrittlement resistance and paint-bake hardenability and process for producing the same | Chemistry; Metallurgy | 6 | Expired |
| US8747577B2 | High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same | Emerging Cross-Sectional Technologies | 5 | Active |
| US5384206A | High-strength cold-rolled steel strip and molten zinc-plated high-strength cold-rolled steel strip having good formability and method of producing such strips | Emerging Cross-Sectional Technologies | 5 | Expired |
| US8657970B2 | Hot-rolled steel sheet excellent in fatigue properties and stretch-flange formability and method for manufacturing the same | Chemistry; Metallurgy | 4 | Active |
| US6866725B2 | Steel pipe excellent in formability and method of producing the same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5954896A | Cold rolled steel sheet and galvanized steel sheet having improved homogeneity in workability and process for producing same | Chemistry; Metallurgy | 3 | Expired |
| US7749343B2 | Method to produce steel sheet excellent in workability | Chemistry; Metallurgy | 3 | Active |
| US9238848B2 | High-strength steel sheet and method for producing same | Chemistry; Metallurgy | 3 | Active |
| US9139885B2 | High-strength steel sheet and high-strength zinc-coated steel sheet which have excellent ductility and stretch-flangeability and manufacturing method thereof | Chemistry; Metallurgy | 2 | Active |
| US9410231B2 | Steel sheet and method of manufacturing steel sheet | Chemistry; Metallurgy | 2 | Active |
| US7776161B2 | Cold-rolled steel sheet excellent in workability | Chemistry; Metallurgy | 1 | Active |
| US7485195B2 | High-strength hot-rolled steel sheet excellent in shape fixability and method of producing the same | Chemistry; Metallurgy | 1 | Expired |
| US8084143B2 | High-yield-ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield-ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same | Emerging Cross-Sectional Technologies | 1 | Expired |
| US9601010B2 | Assessment device, assessment system, assessment method, and computer-readable storage medium | Physics | 1 | Active |
| US8052807B2 | Steel sheet excellent in workability | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.