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发明名称
Keying circuit
摘要
申请公布号
US2217929(A)
申请公布日期
1940.10.15
申请号
US19380240641
申请日期
1938.11.16
申请人
RADIO CORPORATION OF AMERICA
发明人
WASSELL HAROLD JOSEPH HUGHES
分类号
H04L27/04
主分类号
H04L27/04
代理机构
代理人
主权项
地址
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