Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10493515 | Devices and methods for forming bow springs of one-piece centralizers | Eugene Edward Miller, Everette Johnston, Jesse L. Neel, Charles Carroll | 2019-12-03 |
| 4434854 | Pressure actuated vent assembly for slanted wellbores | Roy R. Vann, Flint R. George | 1984-03-06 |
| 4330039 | Pressure actuated vent assembly for slanted wellbores | Roy R. Vann, Flint R. George | 1982-05-18 |
| 4299287 | Bar actuated vent assembly and perforating gun | Roy R. Vann, Flint R. George | 1981-11-10 |