Granted Patent
Utility
US 6,183,687 · App. 08/514,283
Hard composite and method of making the same
Inventor:
Mark S. Greenfield
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Aug 11, 1995
Inventor
Mark S. Greenfield
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.