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发明名称
Popularity meter for phonograph record playing apparatuses
摘要
申请公布号
US2930622(A)
申请公布日期
1960.03.29
申请号
US19540454306
申请日期
1954.09.07
申请人
UNITED MUSIC CORPORATION
发明人
DURANT LYNDON A.
分类号
G11B17/24
主分类号
G11B17/24
代理机构
代理人
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地址
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