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发明名称
Procédé et système de communication par ondes électriques
摘要
申请公布号
FR923783(A)
申请公布日期
1947.07.17
申请号
FRD923783
申请日期
1946.03.13
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
H01J25/68;H03C3/30;H04B7/155;H04B7/165
主分类号
H01J25/68
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代理人
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