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发明名称
Optischer Keil fuer Tonaufzeichnungs- und Vervielfaeltigungsgeraete
摘要
申请公布号
DE856231(C)
申请公布日期
1952.11.20
申请号
DE1938K004975D
申请日期
1938.03.31
申请人
KLANGFILM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
发明人
NEUMANN HELMUT DR.;HACK ERNST
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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