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经营范围
发明名称
Stabilisierter Zweidrahtverstärker.
摘要
申请公布号
CH242743(A)
申请公布日期
1946.05.31
申请号
CHD242743
申请日期
1944.02.16
申请人
STANDARD TELEPHON UND RADIO AG.
发明人
AG. STANDARD TELEPHON UND RADIO
分类号
H04M3/40
主分类号
H04M3/40
代理机构
代理人
主权项
地址
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