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发明名称
Extension ladder
摘要
申请公布号
US1926697(A)
申请公布日期
1933.09.12
申请号
US19310558797
申请日期
1931.08.22
申请人
JOSEPH W. GLEASON
发明人
MURPHY JAMES F.
分类号
E06C5/16;E06C7/12
主分类号
E06C5/16
代理机构
代理人
主权项
地址
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