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发明名称
Telegraph system
摘要
申请公布号
US2340065(A)
申请公布日期
1944.01.25
申请号
US19430480319
申请日期
1943.03.24
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
LANG WILMARTH Y.
分类号
H04L17/18
主分类号
H04L17/18
代理机构
代理人
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地址
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