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| US4020605 | 9 Feb 1976 | 3 May 1977 | | Roof utility unit |
| US4191170 | 21 Oct 1977 | 4 Mar 1980 | | Solar panel |
| US4217742 | 16 Mar 1978 | 19 Ago 1980 | | Roof louver apparatus |
| US4291673 | 9 Ago 1979 | 29 Sep 1981 | | Passive solar roof ice melter |
| US4296733 | 5 Ago 1976 | 27 Oct 1981 | | Heating, lighting and ventilation systems |
| US4375805 | 4 Feb 1981 | 8 Mar 1983 | | Solar roof, eaves and gutter device |
| US4432341 | 5 May 1983 | 21 Feb 1984 | Future Tech, Inc. | Solar heater and roof attachment means |
| US4461277 | 15 Feb 1983 | 24 Jul 1984 | | Thermal energy transfer device |
| US5004269 | 1 Dic 1989 | 2 Abr 1991 | Spade leasing, Inc. | Stepped top fluid storage tank |
| US5611186 | 30 Nov 1994 | 18 Mar 1997 | Elk Corporation of Dallas | Laminated roofing shingle |
| US5666776 | 30 Ago 1995 | 16 Sep 1997 | Elk Corporation of Dallas | Laminated roofing shingle |
| US8007898 | 6 Oct 2010 | 30 Ago 2011 | Cool Angle LLC | Roofing material with directionally dependent properties |
| USD369421 | 17 Mar 1995 | 30 Abr 1996 | Elk Corporation of Dallas | Random cut laminated shingle |
