Improvements in or relating to optical devices,申请号GB19370012478-传众专利搜索

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发明名称	Improvements in or relating to optical devices
摘要
申请公布号	GB494950(A)	申请公布日期	1938.11.01
申请号	GB19370012478	申请日期	1937.05.01
申请人	JOSEF JIRANEK	发明人
分类号	G02C7/14	主分类号	G02C7/14
代理机构		代理人
主权项
地址

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