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经营范围
发明名称
Erecting apparatus
摘要
申请公布号
US2421913(A)
申请公布日期
1947.06.10
申请号
US19450588279
申请日期
1945.04.14
申请人
AMERICAN HOIST & DERRICK CO.
发明人
STODDARD ROBERT J.
分类号
E04H12/34
主分类号
E04H12/34
代理机构
代理人
主权项
地址
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