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发明名称
Electric-sign controller
摘要
申请公布号
US1775949(A)
申请公布日期
1930.09.16
申请号
US19290416585
申请日期
1929.12.26
申请人
WILFRED STAFFORD
发明人
STAFFORD WILFRED
分类号
G09G3/00;H01H37/66
主分类号
G09G3/00
代理机构
代理人
主权项
地址
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