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| US5906359 | 13 août 1997 | 25 mai 1999 | | Cattle gate and fence systems | | US6460292 | 9 juil. 1999 | 8 oct. 2002 | | Barrier gate arm assembly and methods for use thereof | | US6470626 | 17 janv. 2001 | 29 oct. 2002 | MTR, Inc. | Gate release mechanism with detent and plunger, and gate incorporating same | | US6672008 | 5 juil. 2001 | 6 janv. 2004 | MTR, Inc. | Gate release mechanism having a pivotable arm to facilitate maintenance |
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