Emsco Derrick and Equipment Co
Emsco DerrActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2459472A | Rotary swivel | Expired / Lapsed | 1945-03-23 | 1949-01-18 | 0 | Details |
| US2304991A | Valve pot | Expired / Lapsed | 1940-09-13 | 1942-12-15 | 0 | Details |
| US2264518A | Valve operating means for duplex double-acting steam pumps | Expired / Lapsed | 1941-01-24 | 1941-12-02 | 0 | Details |
| US2233649A | Valve | Expired / Lapsed | 1938-05-10 | 1941-03-04 | 0 | Details |
| US2178280A | Power take-off for power driven vehicles | Expired / Lapsed | 1936-02-15 | 1939-10-31 | 0 | Details |
| US2173158A | Trail builder | Expired / Lapsed | 1936-07-06 | 1939-09-19 | 0 | Details |
| US2160595A | Hydraulically operated scraper and the like | Expired / Lapsed | 1935-05-21 | 1939-05-30 | 0 | Details |
| US2150529A | Rotary swivel | Expired / Lapsed | 1937-07-14 | 1939-03-14 | 0 | Details |