Koji Watari
14Patents
5h-index
40Co-inventors
66Inventor score
Filing activity: Apr 13, 1992 → Sep 20, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5922145A | Steel products excellent in machinability and machined steel parts | Chemistry; Metallurgy | 15 | Expired |
| US6083455A | Steels, steel products for nitriding, nitrided steel parts | Chemistry; Metallurgy | 11 | Expired |
| US6475305B1 | Machine structural steel product | Chemistry; Metallurgy | 9 | Expired |
| US6838048B2 | Steel for machine structural use and method of producing same | Chemistry; Metallurgy | 7 | Expired |
| US5217305A | Method of evaluating ceramics | Physics | 5 | Expired |
| US5902542A | Method of producing silicon nitride ceramics having thermal high conductivity | Chemistry; Metallurgy | 4 | Expired |
| US6797231B2 | Steel for machine structural use | Chemistry; Metallurgy | 3 | Expired |
| US5985802A | High-performance lubricant oil | Chemistry; Metallurgy | 2 | Expired |
| US6663828B2 | Sintering method and apparatus using centrifugal force | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US7267808B2 | Aluminum nitride powder, method for producing the same and use thereof | Chemistry; Metallurgy | 1 | Expired |
| US6514476B1 | Anisotropically shaped SrTiO3 single crystal particles | Chemistry; Metallurgy | 1 | Expired |
| US11421727B2 | Carburized shaft part | Emerging Cross-Sectional Technologies | 0 | Active |
| US7459178B2 | Production of oriented material or composite material through centrifugal burning | Chemistry; Metallurgy | 0 | Expired |
| US11345982B2 | Shaft part | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.