Granted Patent
Utility
US 5,811,757 · App. 08/608,748
Power source including parallel switching circuits and related methods for a welding or cutting system
Inventor:
Philip K. Higgins
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Feb 29, 1996
Inventor
Philip K. Higgins
Assignee (at issue)
THE ESAB GROUP 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.