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发明名称
Electric pick-up for phonographs
摘要
申请公布号
US1881109(A)
申请公布日期
1932.10.04
申请号
US19300445399
申请日期
1930.04.18
申请人
HUGO WIENER
发明人
WIENER HUGO
分类号
H04R9/12
主分类号
H04R9/12
代理机构
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