Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5649568 | Glass fiber reinforced cement liners for pipelines and casings | David E. Stikkers, Daniel Hoyer | 1997-07-22 |
| 5599857 | Polymer concrete composition containing high cement content | — | 1997-02-04 |