|
| US4293245 | 8 Jun 1979 | 6 Oct 1981 | | Structural system and structural elements for use and construction of earth filled walls |
| US4490075 | 16 Aug 1982 | 25 Dec 1984 | | Retaining wall system |
| US4815897 | 21 Dec 1984 | 28 Mar 1989 | Rothbury Investments Limited | Retaining wall system |
| US5017049 | 26 Jul 1990 | 21 May 1991 | Block Systems Inc. | Composite masonry block |
| US5062610 | 7 Jun 1990 | 5 Nov 1991 | Block Systems Inc. | Composite masonry block mold for use in block molding machines |
| US5249950 | 30 Jan 1992 | 5 Oct 1993 | Block Systems Inc. | Heated stripper shoe assembly |
| US5294216 | 6 Feb 1991 | 15 Mar 1994 | Anchor Wall Systems, Inc. | Composite masonry block |
| US5484234 | 30 Sep 1994 | 16 Jan 1996 | | Building module for plantable walls with a bulk filling material |
| US5490363 | 13 Oct 1994 | 13 Feb 1996 | Anchor Wall Sytems, Inc. | Composite masonry block |
| US5589124 | 6 Jun 1995 | 31 Dec 1996 | Block Systems, Inc. | Method of forming composite masonry blocks |
| US5704183 | 23 May 1995 | 6 Jan 1998 | Anchor Wall Systems, Inc. | Composite masonry block |
| US5709062 | 15 Jul 1996 | 20 Jan 1998 | Anchor Wall Systems, Inc. | Composite masonry block |
| US5711129 | 4 May 1995 | 27 Jan 1998 | Anchor Wall Systems, Inc. | Masonry block |
| US5795105 | 7 Jun 1995 | 18 Aug 1998 | Anchor Wall Systems, Inc. | Composite masonry block |
| US5827015 | 2 Sep 1997 | 27 Oct 1998 | Anchor Wall Systems, Inc. | Composite masonry block |
| US5879603 | 8 Nov 1996 | 9 Mar 1999 | Anchor Wall Systems, Inc. | Process for producing masonry block with roughened surface |
| US6029943 | 28 Feb 1997 | 29 Feb 2000 | Anchor Wall Systems, Inc. | Splitting technique |
| US6113318 | 7 Aug 1998 | 5 Sep 2000 | Anchor Wall Systems, Inc. | Composite masonry block |
| US6142713 | 25 Sep 1998 | 7 Nov 2000 | Anchor Wall Systems, Inc. | Composite masonry block |
| US6178704 | 1 Jul 1999 | 30 Jan 2001 | Anchor Wall Systems, Inc. | Splitting technique |
| US6183168 | 3 Feb 2000 | 6 Feb 2001 | Anchor Wall Systems, Inc. | Composite masonry block |
| US6250850 | 19 Aug 1999 | 26 Jun 2001 | Rockwood Retaining Walls, Inc. | Block with multifaceted bottom surface |
| US6312197 | 18 Sep 2000 | 6 Nov 2001 | Anchor Wall Systems, Inc. | Composite masonry block |
| US6616382 | 17 Sep 2001 | 9 Sep 2003 | Anchor Wall Systems, Inc. | Composite masonry block |
| US7048472 | 11 Jun 2003 | 23 May 2006 | Anchor Wall Systems, Inc. | Composite masonry block |
| US7360970 | 8 Dec 2005 | 22 Apr 2008 | Anchor Wall Systems, Inc. | Composite masonry block |
| US7384215 | 5 Aug 2003 | 10 Jun 2008 | Anchor Wall Systems, Inc. | Composite masonry block |
| US7618218 | 2 Apr 2007 | 17 Nov 2009 | | Interlocking retainer ties |
| US8070393 | 28 Oct 2009 | 6 Dec 2011 | | Interlocking retainer ties |
| USD445512 | 27 Oct 1997 | 24 Jul 2001 | Anchor Wall Systems, Inc. | Retaining wall block |
| USD458693 | 8 Nov 1996 | 11 Jun 2002 | Anchor Wall Systems, Inc. | Retaining wall block |