Means to prevent double exposures in using plate or film holders for cameras,申请号US19320631671-传众专利搜索

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发明名称	Means to prevent double exposures in using plate or film holders for cameras
摘要
申请公布号	US1954917(A)	申请公布日期	1934.04.17
申请号	US19320631671	申请日期	1932.09.03
申请人	BURNELL WILLIAM E	发明人	BURNELL WILLIAM E.
分类号	G03B17/26	主分类号	G03B17/26
代理机构		代理人
主权项
地址

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