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发明名称
Telephone system
摘要
申请公布号
US2341027(A)
申请公布日期
1944.02.08
申请号
US19400356320
申请日期
1940.09.11
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
EDWARDS WILLIAM H.
分类号
H04M1/80
主分类号
H04M1/80
代理机构
代理人
主权项
地址
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