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经营范围
发明名称
Improvements in or relating to microphones
摘要
申请公布号
GB748136(A)
申请公布日期
1956.04.25
申请号
GB19530006567
申请日期
1953.03.10
申请人
PHILIPS ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
H04R9/08
主分类号
H04R9/08
代理机构
代理人
主权项
地址
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