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发明名称
Granular material and method of making
摘要
申请公布号
US1925065(A)
申请公布日期
1933.08.29
申请号
US19310514373
申请日期
1931.02.09
申请人
EMPIRE TRUST COMPANY
发明人
ATKINSON RALPH L.
分类号
E04D7/00
主分类号
E04D7/00
代理机构
代理人
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地址
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