Portable duplex vacuum type film holder,申请号US19630275387-传众专利搜索

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发明名称	Portable duplex vacuum type film holder
摘要
申请公布号	US3237543(A)	申请公布日期	1966.03.01
申请号	US19630275387	申请日期	1963.04.24
申请人	MORRIS HOFFMAN	发明人	HOFFMAN MORRIS
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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