Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437489 | Fluid-operated pipe clamp | Jesse R. Sanders | 1995-08-01 |
| D340660 | Control panel | — | 1993-10-26 |
| 4796670 | Drill pipe protector | Kevin T. Corbett | 1989-01-10 |
| 4683956 | Method and apparatus for operating multiple tools in a well | — | 1987-08-04 |
| 4676306 | Pressure-controlled accumulator charging valve system for oil field downhole tools | — | 1987-06-30 |
| 4596294 | Surface control bent sub for directional drilling of petroleum wells | — | 1986-06-24 |
| 4570353 | Magnetic single shot inclinometer | John L. Evans | 1986-02-18 |
| 4491187 | Surface controlled auxiliary blade stabilizer | — | 1985-01-01 |
| 4438822 | Clamp-on drill collar stabilizers | — | 1984-03-27 |
| 4415027 | Accumulator recharging valve | — | 1983-11-15 |
| 4407377 | Surface controlled blade stabilizer | — | 1983-10-04 |
| 4361188 | Well apparatus actuating means having pressure accumulator means and method of use | — | 1982-11-30 |
| 4254836 | Methods and apparatus for controlling fluid flow | — | 1981-03-10 |
| 4220176 | Methods and apparatus for controlling fluid flow | — | 1980-09-02 |