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经营范围
发明名称
Phonographic apparatus
摘要
申请公布号
US2350682(A)
申请公布日期
1944.06.06
申请号
US19400348860
申请日期
1940.07.31
申请人
RADIO CORPORATION OF AMERICA
发明人
HOEHN JOHN J.;ZIMMERMAN ARTHUR G.
分类号
G11B3/08;G11B19/265
主分类号
G11B3/08
代理机构
代理人
主权项
地址
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