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经营范围
发明名称
Improvements in or relating to viewing devices for coloured transparencies
摘要
申请公布号
GB698785(A)
申请公布日期
1953.10.21
申请号
GB19520000736
申请日期
1952.01.09
申请人
JOHN REGINALD WALLER;ARTHUR EDWARD GEORGE CHATTERS
发明人
分类号
G02B27/02
主分类号
G02B27/02
代理机构
代理人
主权项
地址
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