发明名称 Spool weight
摘要 A spool weight comprising a metal weight member which is secured to an upper surface of a spool by means of a double sided adhesive disc, the metal weight member and the adhesive disc having apertures therein which are in alignment with the elongated aperture of the thread spool.
申请公布号 US4079897(A) 申请公布日期 1978.03.21
申请号 US19760696797 申请日期 1976.09.27
申请人 BARROW, EDWARD M. 发明人 BARROW, EDWARD M.
分类号 B65H75/02;B65H75/18;(IPC1-7):B65H49/00 主分类号 B65H75/02
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