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发明名称
Improvements in or relating to telephone instrument and like supports
摘要
申请公布号
GB346155(A)
申请公布日期
1931.04.09
申请号
GB19300010593
申请日期
1930.04.03
申请人
WALTER PATRICK GRAFTON
发明人
分类号
H04M1/12
主分类号
H04M1/12
代理机构
代理人
主权项
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