Granted Patent
Utility
US 4,674,648 · App. 06/889,989
Bung keg
Inventor:
Dietmar Przytulla
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Jul 24, 1986
Inventor
Dietmar Przytulla
Assignee (at issue)
Mauser Werke GmbH
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.