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发明名称
Electric sign
摘要
申请公布号
US2318596(A)
申请公布日期
1943.05.11
申请号
US19410393520
申请日期
1941.05.15
申请人
A. C. DAVENPORT AND SON, INC.
发明人
DAVENPORT FRANK G.
分类号
G09F13/00
主分类号
G09F13/00
代理机构
代理人
主权项
地址
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