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发明名称
Microfilm projector
摘要
申请公布号
US2569918(A)
申请公布日期
1951.10.02
申请号
US19460642732
申请日期
1946.01.22
申请人
JOHAN BERGGREN PER
发明人
BERGGREN PER JOHAN
分类号
G03B21/11
主分类号
G03B21/11
代理机构
代理人
主权项
地址
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