Apparatus for setting to best photographic exposure,申请号US19270189985-传众专利搜索

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发明名称	Apparatus for setting to best photographic exposure
摘要
申请公布号	US1859621(A)	申请公布日期	1932.05.24
申请号	US19270189985	申请日期	1927.05.09
申请人	FESSENDEN REGINALD A	发明人	FESSENDEN REGINALD A.
分类号	G03B7/02	主分类号	G03B7/02
代理机构		代理人
主权项
地址

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