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发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB936010(A)
申请公布日期
1963.09.04
申请号
GB19630010167
申请日期
1960.05.16
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;DEREK PHILLIP ALEXANDER
发明人
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
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地址
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