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发明名称
Verfahren zur Herstellung gesetzmaessig verlaufender Graufilter
摘要
申请公布号
DE597049(C)
申请公布日期
1934.05.16
申请号
DE1931K125741D
申请日期
1931.09.25
申请人
DR. WILHELM BIEBER;DR.-ING. CARL KRUG
发明人
分类号
G03C5/02
主分类号
G03C5/02
代理机构
代理人
主权项
地址
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