Granted Patent
Utility
US 4,438,600 · App. 06/301,788
Grinding, welding and cutting apparatus
Inventor:
Paul John Berbakov
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Sep 14, 1981
Inventor
Paul John Berbakov
Assignee (at issue)
The Babcock & Wilcox Company
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.