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发明名称
Telegraph system
摘要
申请公布号
US2327478(A)
申请公布日期
1943.08.24
申请号
US19400343699
申请日期
1940.07.03
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
WATSON EDWARD F.
分类号
H04L15/26
主分类号
H04L15/26
代理机构
代理人
主权项
地址
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