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发明名称
Ladder
摘要
申请公布号
US1780263(A)
申请公布日期
1930.11.04
申请号
US19280317917
申请日期
1928.11.08
申请人
KETTMANN ANDREW P;ANDERSON IRVIN W
发明人
KETTMANN ANDREW P.;ANDERSON IRVIN W.
分类号
E06C7/42
主分类号
E06C7/42
代理机构
代理人
主权项
地址
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