Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226263 | Weather-tight roof flashing shield | William R. Merrin | 1993-07-13 |
| 4608792 | Roof membrane holdown system | — | 1986-09-02 |
| 4603790 | Tensioned reservoir cover, rainwater run-off enhancement system | — | 1986-08-05 |
| 4503988 | Gas collecting tensioned reservoir cover | — | 1985-03-12 |
| 4476992 | Reservoir cover with tensioned plates | — | 1984-10-16 |
| 4446983 | Reservoir cover having a defined peripheral sump | — | 1984-05-08 |