Granted Patent
Utility
US 4,295,320 · App. 06/094,514
Closure conversion apparatus for existing closure applicating machines
Inventor:
Wendell D. Willingham
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Jan 9, 1980
Inventor
Wendell D. Willingham
Assignee (at issue)
Owens-Illinois 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.