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发明名称
Ladder attachment for clamping a ladder to a pole or limb
摘要
申请公布号
US2778556(A)
申请公布日期
1957.01.22
申请号
US19530380911
申请日期
1953.09.18
申请人
JOHNSON WILLARD P
发明人
JOHNSON WILLARD P.
分类号
E06C1/34;E06C7/48
主分类号
E06C1/34
代理机构
代理人
主权项
地址
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