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| Number | Title | Issue Date |
| 5471811 | Combination traffic barrier and retaining wall and method of construction This invention relates to a combination precast concrete traffic barrier element and a precast C-shaped retaining wall, and a method of constructing a traffic barrier using the element on the vertical face of the retaining wall. The barrier element is a p... | 12/05/1995 |
| 5400563 | Combination column and panel barrier system and method of construction This invention relates to both concrete wall having a series of slanted deflection surfaces to spread the force of impacting vehicles, to buttress against earth forces, and to abate noises and to a method of constructing such a wall. The wall can be econo... | 03/28/1995 |
| 5131786 | Traffic barrier and method of construction This invention relates to a pre-cast concrete traffic barrier element and a method of constructing a traffic barrier using the element on a vertical face of a retaining wall. The barrier element is a profiled reinforced block of concrete having a bottom s... | 07/21/1992 |
