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发明名称
Perfectionnements aux amplificateurs à lampes
摘要
申请公布号
FR985674(A)
申请公布日期
1951.07.23
申请号
FRD985674
申请日期
1949.05.04
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED
发明人
分类号
H03F3/32;H03F3/44
主分类号
H03F3/32
代理机构
代理人
主权项
地址
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