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发明名称
Sound-propagating diaphragm
摘要
申请公布号
US1786949(A)
申请公布日期
1930.12.30
申请号
US19280274528
申请日期
1928.05.02
申请人
PREMIER LABORATORY COMPANY
发明人
HUTCHISON MILLER REESE
分类号
H04R7/12
主分类号
H04R7/12
代理机构
代理人
主权项
地址
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