Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5145617 | Method of processing scrap roof-membrane sheet material comprising a flexible synthetic fabric substrate enveloped in a thermoplastic plastic envelope | Harry Hermanson, David R. Grussing | 1992-09-08 |
| 4827686 | Coated roofing membrane | Richard W. Stamper | 1989-05-09 |
| 4666761 | Roofing membrane | Richard W. Stamper | 1987-05-19 |
| 4574103 | Vinyl chloride polymer laminate | Richard W. Stamper | 1986-03-04 |
| 4565732 | Vinyl chloride polymer laminate | Richard W. Stamper | 1986-01-21 |
| 4515744 | Vinyl chloride polymer laminate | Richard W. Stamper | 1985-05-07 |