Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880059 | Sliding sleeve casing tool | John T. Brandell | 1989-11-14 |
| 4875524 | Casing centralizer | Billie J. Bradley, Allen T. Joyce | 1989-10-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880059 | Sliding sleeve casing tool | John T. Brandell | 1989-11-14 |
| 4875524 | Casing centralizer | Billie J. Bradley, Allen T. Joyce | 1989-10-24 |