Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4655108 | Tube-squaring tool and clamping mechanism | — | 1987-04-07 |
| 4406442 | Rotary valve | Leonard A. Bettin, Donald J. Dufour | 1983-09-27 |
| 4344460 | Apparatus for plugging a pressure piping system | — | 1982-08-17 |