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发明名称
SOUND RECORDING APPARATUS
摘要
申请公布号
CA383862(A)
申请公布日期
1939.09.05
申请号
CAD383862
申请日期
申请人
RONAG A. G.
发明人
LEOPOLD NEUMANN
分类号
主分类号
代理机构
代理人
主权项
地址
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