Granted Patent
Utility
US 5,339,930 · App. 07/888,090
Constant tension device for railway car handbrake
Inventors:
Gary M. Sich, Wajih Kanjo
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: May 26, 1992
Inventors
Gary M. Sich
Wajih Kanjo
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.