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经营范围
发明名称
Electric sign contact
摘要
申请公布号
US2244955(A)
申请公布日期
1941.06.10
申请号
US19380243688
申请日期
1938.12.03
申请人
LONG JOHN E
发明人
LONG JOHN E.
分类号
G09G3/00
主分类号
G09G3/00
代理机构
代理人
主权项
地址
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