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发明名称
Kristallfilter veraenderbarer Bandbreite
摘要
申请公布号
DE709817(C)
申请公布日期
1941.08.27
申请号
DE1940T053546D
申请日期
1940.03.17
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
JANSSEN DIPL.-ING. HUGO
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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