Thread tensioning device for sewing machines,申请号US19540470596-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	US2810532(A)	申请公布日期	1957.10.22
申请号	US19540470596	申请日期	1954.11.23
申请人	THE SINGER MANUFACTURING COMPANY	发明人	ZEIER FREDERICK F.;SKOWRONSKI EDWARD S.
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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