Granted Patent
Utility
US 5,367,416 · App. 07/999,504
Spindle grounding device using magnetic fluid
Inventors:
Luke A. Cossette, Zine-Eddine Boutaghou
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: Dec 31, 1992
Inventors
Luke A. Cossette
Zine-Eddine Boutaghou
Assignee (at issue)
International Business Machines 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.