Granted Patent
Utility
US 5,084,115 · App. 07/408,160
Cobalt-based magnet free of rare earths
Inventors:
George C. Hadjipanayis, Chuan Gao, Donald L. Gramlich
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Sep 14, 1989
Inventors
George C. Hadjipanayis
Chuan Gao
Donald L. Gramlich
Assignee (at issue)
Ford Motor Company
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.