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发明名称
Portable projection screen
摘要
申请公布号
US2062878(A)
申请公布日期
1936.12.01
申请号
US19350013196
申请日期
1935.03.27
申请人
FRANK HAMMEL VICTOR
发明人
HAMMEL VICTOR FRANK
分类号
G03B21/58
主分类号
G03B21/58
代理机构
代理人
主权项
地址
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