Granted Patent
Utility
US 6,142,267 · App. 08/582,034
Disc brake rotor
Inventors:
Robert S. Sporzynski, Dean J. Hartford
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jan 2, 1996
Inventors
Robert S. Sporzynski
Dean J. Hartford
Assignee (at issue)
KELSEY-HAYES-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.