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经营范围
发明名称
Optical system
摘要
申请公布号
US2274116(A)
申请公布日期
1942.02.24
申请号
US19380231119
申请日期
1938.09.22
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
WRIGHT WILLIAM DAVID
分类号
H04N5/74
主分类号
H04N5/74
代理机构
代理人
主权项
地址
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