Granted Patent
Utility
US 4,555,935 · App. 06/546,168
Apparatus for pressure testing of can bodies and lids
Inventor:
Karl Elert
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Oct 27, 1983
Inventor
Karl Elert
Assignee (at issue)
The Stroh Brewery 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.