Upper Lakes Shipping Ltd.
2Patents
0Active
2Granted
25Portfolio score
Filing activity: Dec 17, 1979 → Aug 2, 1982
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4574989A | Swing gates | Performing Operations; Transporting | 9 | Expired |
| US4326476A | Navigation in ice covered waterways | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.