Granted Patent
Utility
US 4,290,378 · App. 06/071,460
Twisted singles carpet yarn
Inventor:
Arnold E. Wilkie
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Aug 31, 1979
Inventor
Arnold E. Wilkie
Assignee (at issue)
Monsanto Company
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.