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发明名称
Diapositivfassung aus zwei sich deckelartig ineinanderfuegenden Rahmen
摘要
申请公布号
DE707500(C)
申请公布日期
1941.06.24
申请号
DE1939J066055D
申请日期
1939.12.02
申请人
FERDINAND JACOBS
发明人
JACOBS FERDINAND
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
主权项
地址
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