Granted Patent
Utility
US 5,538,034 · App. 08/347,625
Valve
Inventor:
Rudolf Schwegler
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Dec 1, 1994
Inventor
Rudolf Schwegler
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.