Oil Well Supply Co
Oil Well SActive Patents
0
Total Holdings
6
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2559659A | Pump valve | Expired / Lapsed | 1949-03-07 | 1951-07-10 | 0 | Details |
| US2306739A | Locking mechanism for well drilling rotary | Expired / Lapsed | 1941-04-24 | 1942-12-29 | 0 | Details |
| US2163472A | Valve | Expired / Lapsed | 1936-07-07 | 1939-06-20 | 0 | Details |
| US1971713A | Pump valve | Expired / Lapsed | 1929-07-30 | 1934-08-28 | 0 | Details |
| US1968200A | Pump valve | Expired / Lapsed | 1929-07-26 | 1934-07-31 | 0 | Details |
| US1248881A | Oil-well packer. | Expired / Lapsed | 1915-11-23 | 1917-12-04 | 0 | Details |