Granted Patent
Utility
US 5,866,872 · App. 08/900,309
Plasma arc torch position control
Inventors:
Zhipeng Lu, John Sobr, Norm LeBlanc, Jeffrey L. Peterson
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jul 25, 1997
Inventors
Zhipeng Lu
John Sobr
Norm LeBlanc
Jeffrey L. Peterson
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.