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发明名称
An improved device for making bifocal glasses
摘要
申请公布号
GB480331(A)
申请公布日期
1938.02.21
申请号
GB19360022839
申请日期
1936.08.19
申请人
FRIEDRICH WILHELM OTTO WERNICKE;BRUNO RICHARD MUELLER
发明人
分类号
G02C7/06
主分类号
G02C7/06
代理机构
代理人
主权项
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