Granted Patent
Utility
US 4,365,568 · App. 06/150,254
Underbed thread trimmer and controlled single-operation cam mechanism therefor
Inventor:
Roger J. Ross
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: May 15, 1980
Inventor
Roger J. Ross
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.