|
| US4607985 | 13 May 1985 | 26 Ago 1986 | Taizo Nozawa Katsumasa Machii | Block construction for preventing outflow of ballasts |
| US4993872 | 8 Ago 1989 | 19 Feb 1991 | Con/Span Culvert Systems, Inc. | Precast concrete culvert system |
| US5066169 | 19 Feb 1991 | 19 Nov 1991 | | Retaining wall system |
| US5568999 | 3 Abr 1995 | 29 Oct 1996 | The Tensar Corporation | Retaining wall block system |
| US5851088 | 4 Ago 1997 | 22 Dic 1998 | The Tensar Corporation | Modular retaining wall block system including wall blocks having replaceable dual purpose facing panels and removable spacing tabs |
| US6213689 | 12 Abr 2000 | 10 Abr 2001 | Tokusuke Co., Ltd. | Construction unit for a retaining wall and a method for constructing the retaining wall |
| US6991402 | 17 Oct 2002 | 31 Ene 2006 | StormTrap LLC | Methods and modules for an underground assembly for storm water retention or detention |
| US7160058 | 21 Oct 2005 | 9 Ene 2007 | StormTrap LLC | Methods and module for an underground assembly for storm water retention or detention |
| US7344335 | 7 Dic 2006 | 18 Mar 2008 | StormTrap LLC | Methods and modules for an underground assembly for storm water retention or detention |
| USD617867 | 5 Mar 2009 | 15 Jun 2010 | StormTrap LLC | Module for an underground assembly for storm water retention or detention |