Magnifier unit for instrument dials,申请号US19570668831-传众专利搜索

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发明名称	Magnifier unit for instrument dials
摘要
申请公布号	US2972283(A)	申请公布日期	1961.02.21
申请号	US19570668831	申请日期	1957.06.28
申请人	PAUL KARNOW	发明人	KARNOW PAUL
分类号	G01C17/00	主分类号	G01C17/00
代理机构		代理人
主权项
地址

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