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经营范围
发明名称
Sound diffusing apparatus
摘要
申请公布号
US2065367(A)
申请公布日期
1936.12.22
申请号
US19350057032
申请日期
1935.12.31
申请人
EVANS ROBERT B
发明人
EVANS ROBERT B.
分类号
H04R1/34
主分类号
H04R1/34
代理机构
代理人
主权项
地址
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