发明名称 |
Vertical lift bridge |
摘要 |
|
申请公布号 |
US1855520(A) |
申请公布日期 |
1932.04.26 |
申请号 |
US19300459854 |
申请日期 |
1930.06.09 |
申请人 |
HOWARD ERNEST E |
发明人 |
HOWARD ERNEST E. |
分类号 |
E01D15/02 |
主分类号 |
E01D15/02 |
代理机构 |
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代理人 |
|
主权项 |
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地址 |
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