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发明名称
Sound-reproducing apparatus
摘要
申请公布号
US1795214(A)
申请公布日期
1931.03.03
申请号
US19240702455
申请日期
1924.03.27
申请人
GENERAL ELECTRIC COMPANY
发明人
KELLOGG EDWARD W.
分类号
H04R7/12;H04R9/06
主分类号
H04R7/12
代理机构
代理人
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地址
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