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发明名称
Verfahren zur Herstellung grundgeräuschfreier photographischer Tonaufzeichnungen.
摘要
申请公布号
AT155361(B)
申请公布日期
1939.01.10
申请号
ATD155361
申请日期
1937.10.21
申请人
KLANGFILM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
发明人
分类号
主分类号
代理机构
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