Granted Patent
Utility
US 4,871,898 · App. 07/823,301
Constant arc voltage gas metal arc welding process
Inventors:
Lawrence Cherne, Kevin A. Lyttle
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Aug 17, 1988
Inventors
Lawrence Cherne
Kevin A. Lyttle
Assignee (at issue)
Union Carbide 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.