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发明名称
Loud speaker
摘要
申请公布号
US1855168(A)
申请公布日期
1932.04.19
申请号
US19290400352
申请日期
1929.10.17
申请人
LEKTOPHONE CORPORATION
发明人
FARRAND CLAIR L.
分类号
H04R9/02;H04R9/06
主分类号
H04R9/02
代理机构
代理人
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地址
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