Granted Patent
Utility
US 6,133,543 · App. 09/187,274
System and method for dual threshold sensing in a plasma ARC torch
Inventors:
Dennis M. Borowy, Jon W. Lindsay, Tianting Ren
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Nov 6, 1998
Inventors
Dennis M. Borowy
Jon W. Lindsay
Tianting Ren
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.