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发明名称
Improvements in or relating to telephone receivers
摘要
申请公布号
GB654538(A)
申请公布日期
1951.06.20
申请号
GB19480020160
申请日期
1948.07.28
申请人
FORTIPHONE LIMITED
发明人
WOLFF JOACHIM
分类号
H04R7/10
主分类号
H04R7/10
代理机构
代理人
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