Granted Patent
Utility
US 4,984,940 · App. 07/461,712
Multilayer coated cemented carbide cutting insert
Inventors:
William A. Bryant, George P. Grab
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Jan 8, 1990
Inventors
William A. Bryant
George P. Grab
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.