US2828706A - Bobbin-winder thread spool pins for sewing ...
US2828706A US543876A US54387655A US2828706A US 2828706 A US2828706 A US 2828706A US 543876 A US543876 A US 543876A US 54387655 A US54387655 A US 54387655A US 2828706 A US2828706 A US 2828706A Authority US United States Prior art keywords bed bobbin plate winder actuating Prior art date 1955-10-31 Legal status (The legal status is an assumption and is not a legal …
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