Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828291 | Fluted safety joint apparatus for use in cased oil and gas wells | Mark T. Mitchell | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828291 | Fluted safety joint apparatus for use in cased oil and gas wells | Mark T. Mitchell | 1989-05-09 |