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发明名称
Telephone system
摘要
申请公布号
US1860066(A)
申请公布日期
1932.05.24
申请号
US19300455636
申请日期
1930.05.26
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
WRIGHT ESMOND PHILIP GOODWIN
分类号
H04M3/62
主分类号
H04M3/62
代理机构
代理人
主权项
地址
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