Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1920830A | Method of making propeller blades | Sir WG Armstrong Whitworth and Co Engineers Ltd | Expired / Lapsed | 1932-01-27 | 1933-08-01 | 1952-01-27 | 0.0 yrs | 0 | |
| US1380823A | Clutch for turbine-driven geared propeller-shafts | Sir WG Armstrong Whitworth and Co Engineers Ltd | Expired / Lapsed | 1920-07-20 | 1921-06-07 | 1940-07-20 | 0.0 yrs | 0 | |
| US1353025A | Electrical signaling apparatus | Sir WG Armstrong Whitworth and Co Engineers Ltd | Expired / Lapsed | 1919-04-15 | 1920-09-14 | 1939-04-15 | 0.0 yrs | 0 |