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经营范围
发明名称
Building block and wall construction
摘要
申请公布号
US1798735(A)
申请公布日期
1931.03.31
申请号
US19290409831
申请日期
1929.11.26
申请人
THE HEATH UNIT TILE COMPANY
发明人
HEATH FREDERICK T.
分类号
E04B2/24
主分类号
E04B2/24
代理机构
代理人
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