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发明名称
Verfahren zur Herstellung von Halbton-Reproduktionen ohne Raster, insbesondere für Wertpapiere, und nach diesem Verfahren hergestelltes Halbton-Reproduktionsbild.
摘要
申请公布号
CH170116(A)
申请公布日期
1934.06.30
申请号
CHD170116
申请日期
1932.09.10
申请人
HELM,AUGUST
发明人
HELM,AUGUST
分类号
G03F1/00
主分类号
G03F1/00
代理机构
代理人
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地址
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