Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881598 | Blow-out preventor test tool | Michael P. Stockinger, James R. Tietema | 1989-11-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881598 | Blow-out preventor test tool | Michael P. Stockinger, James R. Tietema | 1989-11-21 |