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发明名称
Motion-picture apparatus and means coacting therewith for providing film strip with reference indicia
摘要
申请公布号
US2521734(A)
申请公布日期
1950.09.12
申请号
US19460668520
申请日期
1946.05.09
申请人
EDGAR LILIENFELD JULIUS
发明人
LILIENFELD JULIUS EDGAR
分类号
G03B15/08
主分类号
G03B15/08
代理机构
代理人
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