Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817447 | Stair or ladder steps of the plate-shaped step type | — | 2004-11-16 |
| 4373957 | Fibre-reinforced cementitious product | — | 1983-02-15 |
| 4263049 | Fibre-reinforced product and method of preparing same | Karl E. Hansen | 1981-04-21 |