Granted Patent
Utility
US 6,525,291 · App. 09/665,650
Process and apparatus for cutting or welding a workpiece
Inventors:
Nicholas A. Sanders, Richard W. Couch, Jr., Yong Yang, Zhipeng Lu, Robert C. Dean, Jr., Kenneth J. Woods, Charles M. Hackett, John Sobr, William J. Connally
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Sep 20, 2000
Inventors
Nicholas A. Sanders
Richard W. Couch, Jr.
Yong Yang
Zhipeng Lu
Robert C. Dean, Jr.
Kenneth J. Woods
Charles M. Hackett
John Sobr
William J. Connally
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.