Granted Patent
Utility
US 4,408,694 · App. 06/267,965
Reinforced plastic home canning ring
Inventor:
Bruce M. Mueller
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: May 28, 1981
Inventor
Bruce M. Mueller
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.