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发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB914696(A)
申请公布日期
1963.01.02
申请号
GB19600017809
申请日期
1960.05.20
申请人
STANDON ASSOCIATES LIMITED
发明人
HACKEY DONALD
分类号
H04M1/654
主分类号
H04M1/654
代理机构
代理人
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地址
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