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经营范围
发明名称
Automatic phonograph
摘要
申请公布号
US1902158(A)
申请公布日期
1933.03.21
申请号
US19310542822
申请日期
1931.06.08
申请人
GENERAL MOTORS RADIO CORPORATION
发明人
BRUMP HERBERT L.;GRAY FREDERICK O.;GRAY FLOYD E.
分类号
G11B17/28
主分类号
G11B17/28
代理机构
代理人
主权项
地址
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