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发明名称
Acoustic diaphragm and loud-speaker combination
摘要
申请公布号
US1761100(A)
申请公布日期
1930.06.03
申请号
US19260083297
申请日期
1926.01.23
申请人
NATHANIEL BALDWIN
发明人
BALDWIN NATHANIEL
分类号
H04R1/42
主分类号
H04R1/42
代理机构
代理人
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