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发明名称
Sound reproducing system
摘要
申请公布号
US2000840(A)
申请公布日期
1935.05.07
申请号
US19300455132
申请日期
1930.05.23
申请人
WIRED RADIO, INC.
发明人
OLSON JOHN
分类号
H04R19/02
主分类号
H04R19/02
代理机构
代理人
主权项
地址
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