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发明名称
Projector
摘要
申请公布号
US2354679(A)
申请公布日期
1944.08.01
申请号
US19400343487
申请日期
1940.07.01
申请人
LEO FRANKEL
发明人
FRANKEL LEO
分类号
G03B21/02;G03B21/32
主分类号
G03B21/02
代理机构
代理人
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