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发明名称
Loud speaker
摘要
申请公布号
US1922181(A)
申请公布日期
1933.08.15
申请号
US19260119575
申请日期
1926.06.30
申请人
THOMAS ADOLPH A
发明人
THOMAS ADOLPH A.
分类号
H04R1/26
主分类号
H04R1/26
代理机构
代理人
主权项
地址
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