Granted Patent
Utility
US 4,259,914 · App. 06/177,310
Bobbin winding mechanism for a sewing machine
Inventor:
Ralph E. Johnson
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Jul 28, 1980
Inventor
Ralph E. Johnson
Assignee (at issue)
The Singer Company Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.