Granted Patent
Utility
US 4,659,264 · App. 06/792,626
Drill and indexable carbide insert therefor
Inventor:
Ernest J. Friedline
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Oct 25, 1985
Inventor
Ernest J. Friedline
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.