|
| US4499700 | 7 Dic 1981 | 19 Feb 1985 | Plannja AB | Roofing sheet |
| US4619100 | 8 May 1984 | 28 Oct 1986 | | Method for fabricating a water impervious roof membrane |
| US4741132 | 27 Abr 1987 | 3 May 1988 | | Multiple panel metal roofing system with overlapping panel edges |
| US4864781 | 18 Feb 1988 | 12 Sep 1989 | | Multiple panel metal roofing system with overlapping panel edges |
| US5295338 | 8 Ene 1992 | 22 Mar 1994 | Alcan Aluminum Corporation | Building panel assembly |
| US5881501 | 22 Ago 1995 | 16 Mar 1999 | Fabrel, Inc. | Roof system and panel therefor |
| US6212839 | 15 Jul 1997 | 10 Abr 2001 | Macgregor (SWE) AB | Design element for building structures |
| US7069614 | 8 Ene 1998 | 4 Jul 2006 | Manufacturers Equity Trust | Modular span multi-cell box girder bridge system |
