Device for holding films or the like,申请号US19330696934-传众专利搜索

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发明名称	Device for holding films or the like
摘要
申请公布号	US2122474(A)	申请公布日期	1938.07.05
申请号	US19330696934	申请日期	1933.11.07
申请人	HEINRICH KARL	发明人	KARL HEINRICH
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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