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发明名称
Building block and assembly thereof
摘要
申请公布号
US2157992(A)
申请公布日期
1939.05.09
申请号
US19360116047
申请日期
1936.12.16
申请人
SMITH LEONARD C
发明人
SMITH LEONARD C.
分类号
E04B2/02;E04B2/28
主分类号
E04B2/02
代理机构
代理人
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地址
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