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发明名称
Intercommunication telephone system
摘要
申请公布号
US2623124(A)
申请公布日期
1952.12.23
申请号
US19490130624
申请日期
1949.12.02
申请人
MODERN TELEPHONE CORPORATION
发明人
IVENS EDGAR;WALL HARRY G.
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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