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发明名称
Phonograph pickup device
摘要
申请公布号
US2480272(A)
申请公布日期
1949.08.30
申请号
US19440519020
申请日期
1944.01.20
申请人
PHILCO CORPORATION
发明人
THOMPSON ELMER O.
分类号
H04R23/00
主分类号
H04R23/00
代理机构
代理人
主权项
地址
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