Granted Patent
Utility
US 4,797,013 · App. 07/012,193
Compact ferrofluidic electrically conducting sealed bearing
Inventors:
Kuldip Raj, Hanumaiah L. Gowda, Ronald Moskowitz
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Feb 9, 1987
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.