Takuya Hara
55Patents
10h-index
78Co-inventors
81Inventor score
Filing activity: Mar 21, 1995 → Nov 15, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5755895A | High strength line pipe steel having low yield ratio and excellent in low temperature toughness | Emerging Cross-Sectional Technologies | 72 | Expired |
| US6264760A | Ultra-high strength, weldable steels with excellent ultra-low temperature toughness | Chemistry; Metallurgy | 34 | Expired |
| US5798004A | Weldable high strength steel having excellent low temperature toughness | Chemistry; Metallurgy | 22 | Expired |
| US5985053A | Steel having improved toughness in welding heat-affected zone | Chemistry; Metallurgy | 22 | Expired |
| US6248191A | Method for producing ultra-high strength, weldable steels with superior toughness | Chemistry; Metallurgy | 19 | Expired |
| US6228183A | Ultra-high strength, weldable, boron-containing steels with superior toughness | Chemistry; Metallurgy | 18 | Expired |
| US6224689A | Ultra-high strength, weldable, essentially boron-free steels with superior toughness | Chemistry; Metallurgy | 17 | Expired |
| US6782921B1 | High-strength steel pipe excellent in formability and burst resistance | Emerging Cross-Sectional Technologies | 13 | Expired |
| USD709199S1 | Perimeter | General | 13 | Active |
| US7393104B2 | Ophthalmic testing unit and ophthalmic testing equipment | Human Necessities | 11 | Expired |
| US7753525B2 | Ophthalmic apparatus | Human Necessities | 9 | Active |
| US6532995B1 | Super-high-strength line pipe excellent in low temperature toughness and production method thereof | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5820699A | Martensitic stainless steel having excellent hot workability and sulfide stress cracking resistance | Chemistry; Metallurgy | 8 | Expired |
| US8326138B2 | Imaging apparatus | Physics | 8 | Active |
| US5716465A | High-corrosion-resistant martensitic stainless steel having excellent weldability and process for producing the same | Chemistry; Metallurgy | 7 | Expired |
| US8715430B2 | High strength steel plate and high strength welded pipe excellent in ductile fracture characteristic and methods of production of same | Chemistry; Metallurgy | 5 | Active |
| US7133277B2 | Electronic device | Electricity | 5 | Expired |
| US7942528B2 | Perimeter | Human Necessities | 4 | Active |
| US8070887B2 | High-strength steel sheet and high-strength steel pipe excellent in deformability and method for producing the same | Chemistry; Metallurgy | 4 | Expired |
| US8039118B2 | Welded steel pipe for high strength line pipe superior in low temperature toughness and method of production of the same | Emerging Cross-Sectional Technologies | 4 | Active |
| US8084144B2 | High strength thick welded steel pipe for line pipe superior in low temperature toughness and method of production of the same | Emerging Cross-Sectional Technologies | 4 | Active |
| US7601231B2 | High-strength steel pipe excellent in low temperature toughness and toughness at weld heat-affected zone | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8049131B2 | Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7695141B2 | Ocular light stimulus apparatus | Human Necessities | 3 | Active |
| US7301763B2 | Electronic device | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.