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经营范围
发明名称
Acoustic device
摘要
申请公布号
US1765124(A)
申请公布日期
1930.06.17
申请号
US19270240508
申请日期
1927.12.16
申请人
PETER PODELL CO. INC.
发明人
BONNAT MAX PAUL
分类号
H04R7/00
主分类号
H04R7/00
代理机构
代理人
主权项
地址
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