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经营范围
发明名称
Black spot compensation apparatus
摘要
申请公布号
US2202511(A)
申请公布日期
1940.05.28
申请号
US19370139356
申请日期
1937.04.28
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
ANDRIEU ROBERT
分类号
H04N5/228
主分类号
H04N5/228
代理机构
代理人
主权项
地址
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