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发明名称
Building block
摘要
申请公布号
US2194047(A)
申请公布日期
1940.03.19
申请号
US19380234743
申请日期
1938.10.13
申请人
MARKLE SIDNEY H
发明人
MARKLE SIDNEY H.
分类号
E04B2/30;E04C1/41
主分类号
E04B2/30
代理机构
代理人
主权项
地址
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