Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651173 | Method for doubly upsetting tubing flanges | William Ball Roy, Brad A. Vigar, Terry E. Steffen | 1997-07-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5651173 | Method for doubly upsetting tubing flanges | William Ball Roy, Brad A. Vigar, Terry E. Steffen | 1997-07-29 |