Granted Patent
Utility
US 4,825,789 · App. 07/229,389
Low bobbin thread detector
Inventors:
Stephen A. Garron, John N. Wurst
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Aug 8, 1988
Inventors
Stephen A. Garron
John N. Wurst
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.