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发明名称
Building block
摘要
申请公布号
US2221649(A)
申请公布日期
1940.11.12
申请号
US19390288526
申请日期
1939.08.05
申请人
WILLARD MULFORD LOGAN
发明人
MULFORD LOGAN WILLARD
分类号
E04C1/42
主分类号
E04C1/42
代理机构
代理人
主权项
地址
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