Granted Patent
Utility
US 6,222,291 · App. 08/706,025
Electric motor having axially centered ball bearings
Inventor:
Zine-Eddine Boutaghou
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Aug 30, 1996
Inventor
Zine-Eddine Boutaghou
Assignee (at issue)
International Business Machines Corporation
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.