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经营范围
发明名称
Sound apparatus
摘要
申请公布号
US1985881(A)
申请公布日期
1935.01.01
申请号
US19340741581
申请日期
1934.08.27
申请人
BUCKLEY LEO J
发明人
BUCKLEY LEO J.
分类号
H04R1/28
主分类号
H04R1/28
代理机构
代理人
主权项
地址
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