Granted Patent
Utility
US 6,173,798 · App. 09/256,807
Tungsten carbide nickel- chromium alloy hard member and tools using the same
Inventors:
William A. Bryant, Edward V. Conley, Ted R. Massa
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Feb 23, 1999
Inventors
William A. Bryant
Edward V. Conley
Ted R. Massa
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.