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发明名称
Sound translating device
摘要
申请公布号
US1960016(A)
申请公布日期
1934.05.22
申请号
US19330664853
申请日期
1933.04.07
申请人
RADIO CORPORATION
发明人
JR. HARRY V. KNAUF,
分类号
H04R9/04
主分类号
H04R9/04
代理机构
代理人
主权项
地址
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