|
| US4546589 | 20 Abr 1981 | 15 Oct 1985 | Seaman Corporation | Single-ply sealed membrane roofing system |
| US4945699 | 3 Oct 1988 | 7 Ago 1990 | Engineered Construction Components (America) | Stress plate |
| US5685117 | 13 Abr 1995 | 11 Nov 1997 | | Shingle system and fastening strip |
| US5956913 | 24 Sep 1997 | 28 Sep 1999 | | Shingle system and fastening strip |
| USRE32710 | 3 Jul 1986 | 12 Jul 1988 | Seaman Corporation | Single-ply sealed membrane roofing system |
