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专利详情
Removable sign supporting device
申请公布号:
US1824578(A)
申请号:
US19290376622
申请日期:
1929.07.08
申请公布日期:
1931.09.22
申请人:
THAKE HENRY G
发明人:
THAKE HENRY G.
分类号:
E01F9/011;E01F9/013;G09F7/18
主分类号:
E01F9/011
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