Granted Patent
Utility
US 5,266,776 · App. 07/927,009
Plasma arc cutting and welding tip
Inventors:
John Boisvert, Barry Aher
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Aug 10, 1992
Inventors
John Boisvert
Barry Aher
Assignee (at issue)
Thermal Dynamics Corporation
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.