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发明名称
Perfectionnements aux dispositifs électriques de filtrage
摘要
申请公布号
FR833837(A)
申请公布日期
1938.11.02
申请号
FRD833837
申请日期
1938.02.17
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED
发明人
分类号
H03F3/52;H03H7/01
主分类号
H03F3/52
代理机构
代理人
主权项
地址
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