Referenziert von|
| US4789137 | 31. Juli 1987 | 6. Dez. 1988 | | Knock-down cattle guard | | US5099610 | 30. Okt. 1990 | 31. März 1992 | | Livestock barrier | | US5160120 | 23. Jan. 1991 | 3. Nov. 1992 | | Self retracting portable cattle guard | | US5595370 | 5. Sept. 1995 | 21. Jan. 1997 | Bodo Oilfield Maintenance Ltd. | Texas gate |
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