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发明名称
Improvements in and relating to electro magnetic transducers
摘要
申请公布号
GB812348(A)
申请公布日期
1959.04.22
申请号
GB19540016439
申请日期
1954.06.03
申请人
LEONARD WALTER MURKHAM
发明人
分类号
H04R9/08
主分类号
H04R9/08
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代理人
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