Granted Patent
Utility
US 5,800,590 · App. 08/842,192
Plunger assembly
Inventor:
Ove Per Pilskar
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Apr 23, 1997
Inventor
Ove Per Pilskar
Assignee (at issue)
Emhart Glass Machinery Investments 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.