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发明名称
Schaltungsanordnung fuer Fernsprechanlagen, bei denen an jeder Sprechstelle ein Besetztzeichen vorgesehen ist
摘要
申请公布号
DE569061(C)
申请公布日期
1933.01.31
申请号
DE1929S089624D
申请日期
1929.01.25
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
WASCHNACK ADOLF
分类号
H04M3/58
主分类号
H04M3/58
代理机构
代理人
主权项
地址
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