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经营范围
发明名称
Improvements in or relating to devices for holding film transparencies
摘要
申请公布号
GB821262(A)
申请公布日期
1959.10.07
申请号
GB19560035884
申请日期
1956.11.23
申请人
DONALD MACDOUGAL PATERSON
发明人
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
主权项
地址
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