Granted Patent
Utility
US 4,384,448 · App. 06/203,759
Ring spinning frame
Inventor:
Arnold E. Wilkie
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Nov 3, 1980
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.