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发明名称
Microphone
摘要
申请公布号
US2957954(A)
申请公布日期
1960.10.25
申请号
US19570644640
申请日期
1957.03.07
申请人
THE TURNER COMPANY
发明人
SWINEHART FRANK
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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