Granted Patent
Utility
US 4,531,192 · App. 06/422,369
Apparatus and method for sensing a workpiece with an electrical arc
Inventor:
George E. Cook
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Sep 23, 1982
Inventor
George E. Cook
Assignee (at issue)
CRC Welding Systems, 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.