Supplemental thread tension for sewing machines,申请号US19490113060-传众专利搜索

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发明名称	Supplemental thread tension for sewing machines
摘要
申请公布号	US2645196(A)	申请公布日期	1953.07.14
申请号	US19490113060	申请日期	1949.08.30
申请人	DOUGLAS SECREST LEVI	发明人	SECREST LEVI DOUGLAS
分类号	D05B47/00	主分类号	D05B47/00
代理机构		代理人
主权项
地址

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