Focusing device for cameras,申请号US19240735996-传众专利搜索

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发明名称	Focusing device for cameras
摘要
申请公布号	US1744691(A)	申请公布日期	1930.01.21
申请号	US19240735996	申请日期	1924.09.05
申请人	ALOIS ULBING	发明人	ULBING ALOIS
分类号	G03B13/20	主分类号	G03B13/20
代理机构		代理人
主权项
地址

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