Granted Patent
Utility
US 5,120,930 · App. 07/395,266
Plasma arc torch with improved nozzle shield and step flow
Inventors:
Nicholas A. Sanders, Richard W. Couch, Jr.
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Aug 17, 1989
Inventors
Nicholas A. Sanders
Richard W. Couch, Jr.
Assignee (at issue)
Hypertherm, 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.