Projection apparatus for positive and negative image pairs,申请号US19480044702-传众专利搜索

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发明名称	Projection apparatus for positive and negative image pairs
摘要
申请公布号	US2558999(A)	申请公布日期	1951.07.03
申请号	US19480044702	申请日期	1948.08.17
申请人	STILWELL DARBY & COMPANY LIMITED	发明人	ALDRICH WILLIAM STANLEY
分类号	G03B23/10	主分类号	G03B23/10
代理机构		代理人
主权项
地址

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