Hughes Tool Co
Hughes TooActive Patents
0
Total Holdings
18
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3321248A | Tunneling machine guidance by impingement of laser beam on … | Expired / Lapsed | 1965-03-09 | 1967-05-23 | 4 | Details |
| US2772899A | Threaded oil well drill stem connection with the threads ha… | Expired / Lapsed | 1948-05-15 | 1956-12-04 | 0 | Details |
| US2727759A | Valved couplers for fluid-conducting conduits | Expired / Lapsed | 1951-10-27 | 1955-12-20 | 0 | Details |
| US2727761A | Couplers for fluid-conducting conduits | Expired / Lapsed | 1951-10-27 | 1955-12-20 | 0 | Details |
| US2674732A | Electronic variable delay circuits | Expired / Lapsed | 1952-12-02 | 1954-04-06 | 0 | Details |
| US2674733A | Electronic sorting system | Expired / Lapsed | 1952-12-02 | 1954-04-06 | 0 | Details |
| US2665410A | Method and apparatus for automatically measuring time inter… | Expired / Lapsed | 1951-03-15 | 1954-01-05 | 0 | Details |
| US2665411A | Double interpolation method and apparatus for measuring tim… | Expired / Lapsed | 1951-03-15 | 1954-01-05 | 0 | Details |
| US2638585A | Radio-locator system | Expired / Lapsed | 1947-09-02 | 1953-05-12 | 0 | Details |
| US2616264A | Hydraulic by-pass control | Expired / Lapsed | 1948-02-06 | 1952-11-04 | 0 | Details |
| US2407642A | Method of treating cutter teeth | Expired / Lapsed | 1945-11-23 | 1946-09-17 | 0 | Details |
| US2293997A | Method of making tool joints | Expired / Lapsed | 1939-08-01 | 1942-08-25 | 0 | Details |
| US2257335A | Tool joint welding | Expired / Lapsed | 1940-04-05 | 1941-09-30 | 0 | Details |
| US2128102A | Overshot | Expired / Lapsed | 1936-06-22 | 1938-08-23 | 0 | Details |
| US2086667A | Method of engaging tool joint threads | Expired / Lapsed | 1935-02-18 | 1937-07-13 | 0 | Details |
| US1947586A | Flow choke | Expired / Lapsed | 1931-04-24 | 1934-02-20 | 0 | Details |
| US1905039A | Antifriction thread for shafts | Expired / Lapsed | 1931-05-16 | 1933-04-25 | 0 | Details |
| US1725235A | Valve support | Expired / Lapsed | 1926-09-23 | 1929-08-20 | 0 | Details |