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发明名称
Combined tone arm and electrical pick-up
摘要
申请公布号
US1742257(A)
申请公布日期
1930.01.07
申请号
US19260103635
申请日期
1926.04.21
申请人
VICTOR TALKING MACHINE COMPANY
发明人
JOHNSON ELDRIDGE R. F.;WILLIAMS SELDEN T.
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