Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5399301 | Method and apparatus for expanding replacement pipe | Douglas K. Chick, Joseph H. Alexander | 1995-03-21 |
| 4901424 | Method of forming an end seal for a pipe liner | — | 1990-02-20 |