Granted Patent
Utility
US 4,296,701 · App. 06/204,420
Threading arrangement for chainstitch sewing on a sewing machine
Inventor:
Robert H. Larsen
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Nov 6, 1980
Inventor
Robert H. Larsen
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.