发明名称 |
Railway crossing gate assembly, components therefor and methods of making the same |
摘要 |
A crossing gate arm comprises at least two generally tubular members having one end engagable with a portion of a crossing gate assembly wherein the opposite free end of the crossing gate arm has a part of one tubular member removed to impart flexibility to the free end.
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申请公布号 |
US6776377(B1) |
申请公布日期 |
2004.08.17 |
申请号 |
US20020299122 |
申请日期 |
2002.11.19 |
申请人 |
WATKINS CRAIG A. |
发明人 |
WATKINS CRAIG A. |
分类号 |
B61L29/02;(IPC1-7):B61L23/00 |
主分类号 |
B61L29/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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