Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5222350 | Roving frame and method | Frederick A. Preston, John W. Gillespie, Jr., Erhard E. Stiepel, Timothy D. Winchester | 1993-06-29 |
| 5193257 | Boiler tube repair apparatus | Andrew F. Estill, Michael D. Gatherwright, Robert L. Smith | 1993-03-16 |
| 4979294 | Boiler tube repair method | Andrew F. Estill, Michael D. Gatherwright, Robert L. Smith | 1990-12-25 |