Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872510 | Subterranean well casing float tool | Douglas J. Lehr, Richard P. Rubbo, Richard L. Forehand | 1989-10-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872510 | Subterranean well casing float tool | Douglas J. Lehr, Richard P. Rubbo, Richard L. Forehand | 1989-10-10 |