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发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB429822(A)
申请公布日期
1935.06.06
申请号
GB19350003307
申请日期
1933.12.06
申请人
AUTOMATIC ELECTRIC COMPANY LIMITED;REGINALD TAYLOR;GEORGE THOMAS BAKER
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
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代理人
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