Granted Patent
Utility
US 6,134,838 · App. 08/804,779
Power door having a drive member disposed within a hanger portion and rollers of a door support engaging the hanger portion for motion therealong
Inventor:
Redreddy S. Reddy
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Feb 24, 1997
Inventor
Redreddy S. Reddy
Assignee (at issue)
Westinghouse Air Brake Co.
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.