Masahiko Takeuchi
46Patents
12h-index
82Co-inventors
84Inventor score
Filing activity: Sep 30, 1982 → Oct 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5763921A | Semiconductor device including retrograde well structure with suppressed substrate bias effects | Electricity | 131 | Expired |
| US6335560B1 | Semiconductor device having a mark section and a dummy pattern | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6569803B2 | Catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4448754A | Monolithic catalyst catalytic converter with catalyst holding expansible retainer ring | Emerging Cross-Sectional Technologies | 23 | Expired |
| US8551908B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 19 | Active |
| US10357744B2 | Exhaust gas purification device | Emerging Cross-Sectional Technologies | 18 | Active |
| US10344655B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 17 | Active |
| US10201805B2 | Exhaust gas purification apparatus | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US10159934B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 16 | Active |
| US10125649B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 14 | Active |
| US6591576B1 | Structural member having closed sections, and apparatus and method for producing the structural member | Fixed Constructions | 14 | Expired |
| US10159935B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 13 | Active |
| US5809952A | Valve opening system of internal combustion engine | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US10183253B2 | Exhaust gas purification device | Emerging Cross-Sectional Technologies | 11 | Active |
| US4784562A | Apparatus for carrying work to and out of press | Emerging Cross-Sectional Technologies | 11 | Expired |
| US10076725B2 | Exhaust gas purification catalyst | Emerging Cross-Sectional Technologies | 11 | Active |
| US6849957B2 | Photomask including auxiliary mark area, semiconductor device and manufacturing method thereof | Electricity | 10 | Expired |
| US10626765B2 | Exhaust gas purification device | Emerging Cross-Sectional Technologies | 10 | Active |
| US5010226A | Automatic seam welding apparatus | Performing Operations; Transporting | 7 | Expired |
| US5018939A | Apparatus for separating iron sheets | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6837490B2 | Paper feeding apparatus | Performing Operations; Transporting | 6 | Expired |
| US8120116B2 | Semiconductor device and photomask | Electricity | 4 | Active |
| US6521933B2 | Semiconductor device and method of manufacturing the same | Electricity | 4 | Expired |
| US10596068B2 | Drug container connector and male member cover | Human Necessities | 3 | Active |
| US8981422B2 | Semiconductor device and method of manufacturing the same | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.