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发明名称
System for controlling the energizing of lamps on electric signs
摘要
申请公布号
US1788727(A)
申请公布日期
1931.01.13
申请号
US19280249390
申请日期
1928.01.25
申请人
GEORG MAURER
发明人
MAURER GEORG
分类号
G09G3/00
主分类号
G09G3/00
代理机构
代理人
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地址
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