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发明名称
Loud speaker
摘要
申请公布号
US1984550(A)
申请公布日期
1934.12.18
申请号
US19290365835
申请日期
1929.05.25
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
SANDEMAN EDWARD K.
分类号
H04R1/32
主分类号
H04R1/32
代理机构
代理人
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地址
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