Granted Patent
Utility
US 4,942,834 · App. 07/361,626
Looper shifting device in overlock sewing machine
Inventor:
Koji Kitai
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Jun 5, 1989
Inventor
Koji Kitai
Assignee (at issue)
SSMC Inc.
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.