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经营范围
发明名称
CARBON MICROPHONES
摘要
申请公布号
IE27860(L)
申请公布日期
1965.01.23
申请号
IE19640000521
申请日期
1964.05.14
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H04R21/02;(IPC1-7):H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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