Granted Patent
Utility
US 5,485,331 · App. 08/129,655
High resistivity bearing balls for spindle motor isolation
Inventors:
John C. Dunfield, Klaus Kloeppel, Robert M. Pelstring, Donald J. MacLeod, Michael John Raffetto, Frederick Frank Kazmierczak
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Sep 30, 1993
Inventors
John C. Dunfield
Klaus Kloeppel
Robert M. Pelstring
Donald J. MacLeod
Michael John Raffetto
Frederick Frank Kazmierczak
Assignee (at issue)
Seagate Technology LLC
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.