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发明名称
Sound translating device
摘要
申请公布号
US2227574(A)
申请公布日期
1941.01.07
申请号
US19390302211
申请日期
1939.10.31
申请人
RADIO CORPORATION
发明人
CREAGER FREDERICK L.
分类号
G11B3/46
主分类号
G11B3/46
代理机构
代理人
主权项
地址
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