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发明名称
Building block
摘要
申请公布号
US2321449(A)
申请公布日期
1943.06.08
申请号
US19400365437
申请日期
1940.11.13
申请人
ARMAO JOHN I
发明人
ARMAO JOHN I.
分类号
B28B23/02;E04B2/02;E04C1/40
主分类号
B28B23/02
代理机构
代理人
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地址
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