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经营范围
发明名称
Improvements in or relating to optical magnifying appliances
摘要
申请公布号
GB552729(A)
申请公布日期
1943.04.21
申请号
GB19410016197
申请日期
1941.12.16
申请人
WALTER KIESCHKE
发明人
分类号
G02B25/00
主分类号
G02B25/00
代理机构
代理人
主权项
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