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经营范围
发明名称
SOUND RECORDING APPARATUS
摘要
申请公布号
CA334682(A)
申请公布日期
1933.08.08
申请号
CAD334682
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY
发明人
DAVID W. RAYNOLDS;PAUL J. SCHWARZHAUPT
分类号
主分类号
代理机构
代理人
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