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发明名称
Building block
摘要
申请公布号
US2172053(A)
申请公布日期
1939.09.05
申请号
US19380239516
申请日期
1938.11.08
申请人
CALAVERAS CEMENT COMPANY
发明人
ROBBINS CARL B.
分类号
E04B1/76;E04B2/02;E04B2/42
主分类号
E04B1/76
代理机构
代理人
主权项
地址
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