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发明名称
Telegraph key
摘要
申请公布号
US2230105(A)
申请公布日期
1941.01.28
申请号
US19380232498
申请日期
1938.09.30
申请人
RADIO CORPORATION
发明人
CROSBY MURRAY G.
分类号
H04L15/08
主分类号
H04L15/08
代理机构
代理人
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