Granted Patent
Utility
US 4,764,036 · App. 07/050,229
PCD enhanced radial bearing
Inventor:
James McPherson
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: May 14, 1987
Inventor
James McPherson
Assignee (at issue)
SMITH INTERNATIONAL, 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.