Thread tensioning device for sewing machines,申请号US19310526619-传众专利搜索

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发明名称	Thread tensioning device for sewing machines
摘要
申请公布号	US1907042(A)	申请公布日期	1933.05.02
申请号	US19310526619	申请日期	1931.03.31
申请人	THE SINGER MANUFACTURING COMPANY	发明人	CORRALL HERBERT
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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