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摘要
申请公布号
US2312317(A)
申请公布日期
1943.03.02
申请号
US19410411667
申请日期
1941.09.20
申请人
TELETYPE CORPORATION
发明人
BURCKY CHARLES W.
分类号
H04L21/04
主分类号
H04L21/04
代理机构
代理人
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