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发明名称
Ladder tread
摘要
申请公布号
US2562564(A)
申请公布日期
1951.07.31
申请号
US19460653855
申请日期
1946.03.12
申请人
MCGLOTHLEN JOHN L
发明人
MCGLOTHLEN JOHN L.
分类号
E06C1/20;E06C1/387;E06C1/393;E06C7/48
主分类号
E06C1/20
代理机构
代理人
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地址
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