Granted Patent
Utility
US 4,647,749 · App. 06/692,431
Apparatus and method for weld cladding cylindrical objects
Inventor:
Philip Koshy
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Jan 17, 1985
Inventor
Philip Koshy
Assignee (at issue)
Joy Manufacturing 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.