Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5664891 | Downhole bearing assembly which accommodates compressive and tensile axial | Raymond Samuel Livingstone, Raymond D. Livingstone | 1997-09-09 |
| 5638910 | Downhole sub for directional drilling | Paul Noe | 1997-06-17 |