Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5597016 | Mechanical lockout for pressure responsive downhole tool | Paul D. Ringgenberg | 1997-01-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5597016 | Mechanical lockout for pressure responsive downhole tool | Paul D. Ringgenberg | 1997-01-28 |