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发明名称
Schalteinrichtung fuer wechselnde, elektrische Lichtschrift
摘要
申请公布号
DE518398(C)
申请公布日期
1931.02.14
申请号
DE1929E039609D
申请日期
1929.07.21
申请人
ELEKTROTECHNISCHE FABRIK RIWENA G.M.B.H.
发明人
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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