Granted Patent
Utility
US 4,957,396 · App. 07/252,425
Cutting insert with chip control
Inventor:
Kenneth L. Niebauer
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Sep 30, 1988
Inventor
Kenneth L. Niebauer
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.