Granted Patent
Utility
US 4,720,199 · App. 06/903,229
Bearing structure for downhole motors
Inventors:
Bela Geczy, James McPherson, Robert G. Toth
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Sep 3, 1986
Inventors
Bela Geczy
James McPherson
Robert G. Toth
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.