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经营范围
发明名称
Optik in Lichttonaufzeichnungsgeraeten
摘要
申请公布号
DE668932(C)
申请公布日期
1938.12.12
申请号
DE1936K141199D
申请日期
1936.02.21
申请人
KLANGFILM G.M.B.H.
发明人
SCHWARZ KARL
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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