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发明名称
Tone equalizing mechanism
摘要
申请公布号
US2317069(A)
申请公布日期
1943.04.20
申请号
US19410408462
申请日期
1941.08.27
申请人
LA MAR CHARLES R
发明人
MAR CHARLES R. LA
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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