Granted Patent
Utility
US 5,131,481 · App. 07/630,147
Insert having a surface of carbide particles
Inventor:
Emlyn N. Smith
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: Dec 19, 1990
Inventor
Emlyn N. Smith
Assignee (at issue)
KENNAMETAL 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.