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发明名称
Telegraph switching system
摘要
申请公布号
US1774716(A)
申请公布日期
1930.09.02
申请号
US19280273830
申请日期
1928.04.30
申请人
RESERVE HOLDING COMPANY
发明人
LOMAX CLARENCE E.
分类号
H04L12/00
主分类号
H04L12/00
代理机构
代理人
主权项
地址
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