Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5193257 | Boiler tube repair apparatus | Paul W. Bowman, Andrew F. Estill, Robert L. Smith | 1993-03-16 |
| 4979294 | Boiler tube repair method | Paul W. Bowman, Andrew F. Estill, Robert L. Smith | 1990-12-25 |