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经营范围
发明名称
Improvements in and relating to optical projection devices
摘要
申请公布号
GB622333(A)
申请公布日期
1949.04.29
申请号
GB19470006644
申请日期
1947.03.10
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;FRANK SWAIN HAWKINS;EDWARD REGINALD THOMAS
发明人
分类号
G03B21/16
主分类号
G03B21/16
代理机构
代理人
主权项
地址
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