|
| US4596103 | 10 Oct 1984 | 24 Jun 1986 | | Stone set for vertical wall assemblies |
| US4608795 | 16 Dec 1983 | 2 Sep 1986 | Dynamit Nobel Aktiengesellschaft | Facings of inorganic molding compositions for building components |
| US4719737 | 19 Feb 1987 | 19 Jan 1988 | Sylsands Securities (Properietary) Limited | Interlocking construction block |
| US5511350 | 13 Feb 1995 | 30 Apr 1996 | | Block wall system |
| US5592784 | 27 Oct 1994 | 14 Jan 1997 | Forma Block, Inc. | Trench structure |
