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发明名称
Sound reproducer
摘要
申请公布号
US1959005(A)
申请公布日期
1934.05.15
申请号
US19300434484
申请日期
1930.03.10
申请人
PARSHALL HARRY R
发明人
PARSHALL HARRY R.
分类号
H04R15/00
主分类号
H04R15/00
代理机构
代理人
主权项
地址
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