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发明名称
Building block
摘要
申请公布号
US1816916(A)
申请公布日期
1931.08.04
申请号
US19280253555
申请日期
1928.02.11
申请人
SENTROP JOHANNES T
发明人
SENTROP JOHANNES T.
分类号
E04B2/02;E04B2/14
主分类号
E04B2/02
代理机构
代理人
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地址
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