Granted Patent
Utility
US 4,420,959 · App. 06/221,568
Apparatus for threading closures
Inventor:
Roderick V. King
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Dec 31, 1980
Inventor
Roderick V. King
Assignee (at issue)
Ethyl Products 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.