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发明名称
Apparatus for recording and reproducing sound
摘要
申请公布号
US2313790(A)
申请公布日期
1943.03.16
申请号
US19400336941
申请日期
1940.05.24
申请人
WICKLIFFE CHARLES A
发明人
WICKLIFFE CHARLES A.
分类号
主分类号
代理机构
代理人
主权项
地址
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