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发明名称
Verschlußeinrichtung für die Projektionsöffnungen von Kinovorführungsräumen.
摘要
申请公布号
AT117186(B)
申请公布日期
1930.04.10
申请号
ATD117186
申请日期
1928.07.31
申请人
PETER HELFERT
发明人
PETER HELFERT
分类号
主分类号
代理机构
代理人
主权项
地址
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