|
| US4637189 | 25 Feb 1985 | 20 Ene 1987 | The Dow Chemical Company | Thermal insulation system |
| US4729202 | 22 Sep 1986 | 8 Mar 1988 | | Roofing tile |
| US4899514 | 13 Nov 1985 | 13 Feb 1990 | | Ballast block for roofing structures |
| US5174092 | 10 Abr 1991 | 29 Dic 1992 | | Steel tile roof |
| US5347768 | 14 Jun 1993 | 20 Sep 1994 | | Roofing system and method |
| US5581968 | 28 Jun 1995 | 10 Dic 1996 | Composite Products, Inc. | Seam connector for siding panels |
| US6061987 | 24 Abr 1998 | 16 May 2000 | Lemke Manufacturing, Inc. | Sheet panels for easy to assemble structures |
| US6619006 | 28 Mar 2002 | 16 Sep 2003 | | Roofing shingle |