Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5649568 | Glass fiber reinforced cement liners for pipelines and casings | William C. Allen, Daniel Hoyer | 1997-07-22 |
| 5566986 | Dual gasket lined pipe connector | William C. Allen, William M. Rickard, Daniel Hoyer, Matthew J. Kelley | 1996-10-22 |
| 5405171 | Dual gasket lined pipe connector | William C. Allen, William M. Rickard, Daniel Hoyer, Matthew L. Kelley | 1995-04-11 |