Negative holder for photographic printing machines,申请号US19290414272-传众专利搜索

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发明名称	Negative holder for photographic printing machines
摘要
申请公布号	US1857381(A)	申请公布日期	1932.05.10
申请号	US19290414272	申请日期	1929.12.16
申请人	HUEBNER-BLEISTEIN PATENTS COMPANY	发明人	HUEBNER WILLIAM C.
分类号	G03B27/20	主分类号	G03B27/20
代理机构		代理人
主权项
地址

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