Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4601492 | Releasable coupling | — | 1986-07-22 |
| 4576233 | Differential pressure actuated vent assembly | — | 1986-03-18 |
| 4554975 | Hold down apparatus for wireline operated gun | Roy R. Vann | 1985-11-26 |
| 4544034 | Actuation of a gun firing head | — | 1985-10-01 |
| 4538680 | Gun below packer completion tool string | Emmet F. Brieger, Edward A. Colle, Jr. | 1985-09-03 |
| 4512406 | Bar actuated vent assembly | Roy R. Vann, Dennis F. Warren | 1985-04-23 |
| 4510999 | Well cleanup and completion method and apparatus | Emmet F. Brieger | 1985-04-16 |
| 4498541 | Method of well completion | Emmet F. Brieger, Edward A. Colle, Jr. | 1985-02-12 |
| 4436154 | Method for controlling subsurface blowout | Roy R. Vann | 1984-03-13 |
| 4434854 | Pressure actuated vent assembly for slanted wellbores | Roy R. Vann, George W. Ribble | 1984-03-06 |
| 4330039 | Pressure actuated vent assembly for slanted wellbores | Roy R. Vann, George W. Ribble | 1982-05-18 |
| 4299287 | Bar actuated vent assembly and perforating gun | Roy R. Vann, George W. Ribble | 1981-11-10 |