Granted Patent
Utility
US 4,281,609 · App. 06/145,907
Lockstitch sewing by needle looper
Inventor:
Josef Zocher
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: May 2, 1980
Inventor
Josef Zocher
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.