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发明名称
Projection screen
摘要
申请公布号
US2552455(A)
申请公布日期
1951.05.08
申请号
US19490070917
申请日期
1949.01.14
申请人
PHILCO CORPORATION
发明人
POND CHESTER C.
分类号
G03B21/60;G03B21/62
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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