Device for self threading motion picture devices,申请号US19550554780-传众专利搜索

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发明名称	Device for self threading motion picture devices
摘要
申请公布号	US2807979(A)	申请公布日期	1957.10.01
申请号	US19550554780	申请日期	1955.12.22
申请人	BELL & HOWELL COMPANY	发明人	HENRIKSEN ELMER C.
分类号	G03B1/42	主分类号	G03B1/42
代理机构		代理人
主权项
地址

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