E&D CO., LTD.
3Patents
3Active
3Granted
45Portfolio score
Filing activity: Nov 4, 2009 → Mar 22, 2013 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8425153B1 | Arched culvert and method of manufacture | Fixed Constructions | 25 | Active |
| US8425152B1 | Arched culvert and method of manufacture | Fixed Constructions | 3 | Active |
| US9371765B2 | Metal filter for purifying exhaust gas from ship, and preparation method thereof | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.