Granted Patent
Utility
US 6,717,096 · App. 10/083,029
Dual mode plasma arc torch
Inventors:
Roger W. Hewett, Kevin Horner-Richardson, Joseph P. Jones, Shiyu Chen, Fred Rogers
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Feb 26, 2002
Inventors
Roger W. Hewett
Kevin Horner-Richardson
Joseph P. Jones
Shiyu Chen
Fred Rogers
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.