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| Number | Title | Issue Date |
| 7090439 | Retaining wall construction element for railway installations A precast concrete retaining wall construction element for retaining a soil mass in a railway installation or the like includes an upstanding solid face panel having the shape of a hexahedron where a rectangular front wall and an integral stem. The front wall define... | 08/15/2006 |
| 7073984 | Retaining wall construction element and shear key A precast concrete retaining wall construction element for retaining a soil mass in a railway installation or the like includes an upstanding solid face panel having the shape of a hexahedron where a rectangular front wall and an integral stem. The front wall define... | 07/11/2006 |
| 7044687 | Retaining wall construction including precast elements A precast concrete retaining wall construction element for retaining a soil mass in a railway installation or the like includes an upstanding solid face panel having the shape of a hexahedron where a rectangular front wall and an integral stem. The front wall define... | 05/16/2006 |
| 6994495 | Reinforced retaining wall construction element A precast concrete retaining wall construction element for retaining a soil mass in a railway installation or the like includes an upstanding solid face panel having the shape of a hexahedron where a rectangular front wall and an integral stem. The front wall define... | 02/07/2006 |
| 5193714 | Modular vault for storage tanks A containment vault for storage tanks formed of substantially duplicate modules arranged in sets of four to encircle a received tank and provide an inwardly directed octagonal support rib assembly. The modules are clamped together to define each set and t... | 03/16/1993 |
| 5190413 | Earthwork system A retaining wall formed of rhombus-shaped panels which, when stacked, form continuous joint lines at approximately 30° to the horizontal. The panels are internally reinforced and include centrally located, embedded, projecting connectors interlocked to e... | 03/02/1993 |
