Granted Patent
Utility
US 5,456,522 · App. 08/323,481
Concave cutter bit
Inventor:
Wayne H. Beach
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Oct 14, 1991
Inventor
Wayne H. Beach
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.