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发明名称
Transparent projection screen
摘要
申请公布号
US2213077(A)
申请公布日期
1940.08.27
申请号
US19370180233
申请日期
1937.12.16
申请人
THE FIRM OF FERNSEH AKTIENGESELLSCHAFT
发明人
SCHWARTZ ERICH
分类号
G03B21/62
主分类号
G03B21/62
代理机构
代理人
主权项
地址
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