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经营范围
发明名称
Film and slide projecting apparatus
摘要
申请公布号
US2317310(A)
申请公布日期
1943.04.20
申请号
US19410391074
申请日期
1941.04.30
申请人
GERTRUDE ISRAEL
发明人
STERN YERMIE
分类号
G03B21/00
主分类号
G03B21/00
代理机构
代理人
主权项
地址
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