Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4694634 | Vacuum sealing device for insulated steam injection tubing | Paul T. Anderson, Lawrence F. Irwin, John C. Matthews | 1987-09-22 |
| 4679378 | Vacuum sealing device for insulated steam injection tubing | Paul T. Anderson, Lawrence F. Irwin, John C. Matthews | 1987-07-14 |