Granted Patent
Utility
US 4,898,480 · App. 07/263,539
Compact ferrofluidic electrically conducting sealed bearing
Inventors:
Kuldip Raj, Hanumaiah L. Gowda, Ronald Moskowitz
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Oct 27, 1988
Inventors
Kuldip Raj
Hanumaiah L. Gowda
Ronald Moskowitz
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.