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经营范围
发明名称
Incisible or impressible discs for sound records
摘要
申请公布号
GB484434(A)
申请公布日期
1938.05.05
申请号
GB19370011548
申请日期
1937.04.22
申请人
FRANZ NEUMANN;ALOIS DENGLER
发明人
分类号
主分类号
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主权项
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