Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4410391 | Apparatus for relining an underground gas line or the like without excavation | William R. Thomas | 1983-10-18 |
| 4394202 | Method for relining an underground gas line or the like without excavation | William R. Thomas | 1983-07-19 |