|
| US4169688 | 9 Nov 1977 | 2 Oct 1979 | | Artificial skating-rink floor |
| US4765113 | 10 Mar 1987 | 23 Aug 1988 | | Roofing structure |
| US5611186 | 30 Nov 1994 | 18 Mar 1997 | Elk Corporation of Dallas | Laminated roofing shingle |
| US5666776 | 30 Aug 1995 | 16 Sep 1997 | Elk Corporation of Dallas | Laminated roofing shingle |
| US5729947 | 3 May 1996 | 24 Mar 1998 | | Covering |
| US7234281 | 23 Jan 2006 | 26 Jun 2007 | | Above-joist, integrated deck-gutter system |
| USD369421 | 17 Mar 1995 | 30 Apr 1996 | Elk Corporation of Dallas | Random cut laminated shingle |
