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经营范围
发明名称
Oscillatory member for loud speakers, microphones, or the like
摘要
申请公布号
US1853343(A)
申请公布日期
1932.04.12
申请号
US19290368361
申请日期
1929.06.04
申请人
RADIO CORPORATION
发明人
FILIPPO HENDRIK
分类号
H04R7/14
主分类号
H04R7/14
代理机构
代理人
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地址
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