Photometers, more particularly photographic exposure meters,申请号US19550490643-传众专利搜索

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发明名称	Photometers, more particularly photographic exposure meters
摘要
申请公布号	US2930281(A)	申请公布日期	1960.03.29
申请号	US19550490643	申请日期	1955.02.25
申请人	DAYSTROM, INCORPORATED	发明人	DUNN JOHN FREDERICK
分类号	G01J1/42	主分类号	G01J1/42
代理机构		代理人
主权项
地址

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