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发明名称
Sound box for talking machines and like devices
摘要
申请公布号
US1809493(A)
申请公布日期
1931.06.09
申请号
US19260122707
申请日期
1926.07.15
申请人
ANDREA SMITH LEO
发明人
SMITH LEO ANDREA
分类号
H04R1/38
主分类号
H04R1/38
代理机构
代理人
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地址
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