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发明名称
Self-storing rear screen projector
摘要
申请公布号
US3352203(A)
申请公布日期
1967.11.14
申请号
US19650504357
申请日期
1965.10.24
申请人
BELL & HOWELL COMPANY
发明人
BARKE BERNARD A.;OEHRKE REINHART P.
分类号
G03B21/30
主分类号
G03B21/30
代理机构
代理人
主权项
地址
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