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经营范围
发明名称
Kristallfilter veraenderbarer Bandbreite
摘要
申请公布号
DE706268(C)
申请公布日期
1941.05.22
申请号
DE1939T052251D
申请日期
1939.05.17
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
HERZOG DR. WERNER
分类号
H03H9/54
主分类号
H03H9/54
代理机构
代理人
主权项
地址
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