Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4893505 | Subsurface formation testing apparatus | Wade M. Johnson | 1990-01-16 |
| 4720996 | Power control system for subsurface formation testing apparatus | Dean C. Minehart | 1988-01-26 |