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发明名称
Microphone waterproofing device
摘要
申请公布号
US2556168(A)
申请公布日期
1951.06.12
申请号
US19470776568
申请日期
1947.09.27
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
CRAGG WILLIAM DONALD;GAYFORD MICHAEL LAWRENCE
分类号
H04R1/08
主分类号
H04R1/08
代理机构
代理人
主权项
地址
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