Granted Patent
Utility
US 4,526,484 · App. 06/534,415
Ferrofluid thrust and radial bearing assembly
Inventors:
Philip Stahl, Dudley D. Fuller, Harry C. Rippel
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Sep 21, 1983
Inventors
Philip Stahl
Dudley D. Fuller
Harry C. Rippel
Assignee (at issue)
Ferrofluidics 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.