Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2968707A | Control means for oil well pumps | Perfect Circle Corp | Expired / Lapsed | 1956-11-20 | 1961-01-17 | 1976-11-20 | 0.0 yrs | 0 | |
| US2621416A | Cylinder bore contour gauge | Perfect Circle Corp | Expired / Lapsed | 1947-04-16 | 1952-12-16 | 1967-04-16 | 0.0 yrs | 0 |