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经营范围
发明名称
Electromechanical sound recording and reproducing machine
摘要
申请公布号
US2330919(A)
申请公布日期
1943.10.05
申请号
US19410380462
申请日期
1941.02.25
申请人
REBOLD JACOB H
发明人
REBOLD JACOB H.
分类号
G11B3/00
主分类号
G11B3/00
代理机构
代理人
主权项
地址
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