Granted Patent
Utility
US 4,447,175 · App. 06/389,406
Cutting insert
Inventor:
Donald W. Warren
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Jun 17, 1982
Inventor
Donald W. Warren
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.