Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6109347 | One-trip, thru-tubing, window-milling system | Andy Ferguson | 2000-08-29 |
| 5697438 | Torque control device for downhole milling | Hans H. Rehbock, Wayne Biart | 1997-12-16 |
| 4986358 | Flapper mount for well safety valve | Brian A. Roth | 1991-01-22 |