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发明名称
Schaltungsanordnung fuer Tuerlautsprecheranlagen
摘要
申请公布号
DE740119(C)
申请公布日期
1943.10.12
申请号
DE1938S133583D
申请日期
1938.08.25
申请人
S. SIEDLE & SOEHNE TELEFON- U. TELEGRAFENWERKE AKT.-GES.
发明人
SIEDLE KURT
分类号
H04M11/02
主分类号
H04M11/02
代理机构
代理人
主权项
地址
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