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经营范围
发明名称
Vorrichtung zur Schonung der Filme in Kinematographen
摘要
申请公布号
DE496682(C)
申请公布日期
1930.04.29
申请号
DE1927O016791D
申请日期
1927.09.29
申请人
ETIENNE OEHMICHEN
发明人
分类号
G03B1/42
主分类号
G03B1/42
代理机构
代理人
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地址
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