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发明名称
Telegraph exchange system
摘要
申请公布号
US1979273(A)
申请公布日期
1934.11.06
申请号
US19320631016
申请日期
1932.08.30
申请人
BELL TELEPHONE LABSRATORIES, INCORPORATED
发明人
LANE CUTHBERT C.;LOCKE GEORGE A.
分类号
H04L12/04;H04L12/18
主分类号
H04L12/04
代理机构
代理人
主权项
地址
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