Schlumberger Well Surveying Corp
SchlumbergActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3181117A | Signal processing systems | Expired / Lapsed | 1959-04-17 | 1965-04-27 | 2 | Details |
| US2994962A | Tubing measuring apparatus using pulse sequences | Expired / Lapsed | 1957-12-19 | 1961-08-08 | 0 | Details |
| US2842852A | Memorizing system | Expired / Lapsed | 1955-03-16 | 1958-07-15 | 0 | Details |
| US2550005A | Well logging method and apparatus utilizing periodically va… | Expired / Lapsed | 1948-04-22 | 1951-04-24 | 0 | Details |
| US2317259A | Device for determining the strata traversed by drill holes | Expired / Lapsed | 1938-02-15 | 1943-04-20 | 0 | Details |
| US2222608A | Electrical surveying in drill holes | Expired / Lapsed | 1937-05-17 | 1940-11-26 | 0 | Details |
| US2220070A | Method of and apparatus for magnetically exploring earth st… | Expired / Lapsed | 1936-03-24 | 1940-11-05 | 0 | Details |
| US2220788A | Method and apparatus for investigating subterranean strata … | Expired / Lapsed | 1935-06-24 | 1940-11-05 | 0 | Details |