Granted Patent
Utility
US 5,011,509 · App. 07/390,204
Composite compact with a more thermally stable cutting edge and method of manufacturing the same
Inventor:
Robert H. Frushour
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Aug 7, 1989
Inventor
Robert H. Frushour
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.