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发明名称
Telephone system including line identifying means
摘要
申请公布号
US2854519(A)
申请公布日期
1958.09.30
申请号
US19560578952
申请日期
1956.04.18
申请人
GENERAL DYNAMICS CORPORATION
发明人
HARRIS BEN A.
分类号
H04M15/08
主分类号
H04M15/08
代理机构
代理人
主权项
地址
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