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发明名称
Signboard
摘要
申请公布号
US1818722(A)
申请公布日期
1931.08.11
申请号
US19280299895
申请日期
1928.08.16
申请人
MET-L-WOOD CORPORATION
发明人
LEWIS GEORGE K.
分类号
G09F7/00
主分类号
G09F7/00
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代理人
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