Granted Patent
Utility
US 5,794,739 · App. 08/664,391
Pneumatic pressure operated parking brake for a railway vehicle brake system
Inventors:
Michael E. Ring, Scott Natschke, Michael G. Hawryszkow
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Jun 14, 1996
Inventors
Michael E. Ring
Scott Natschke
Michael G. Hawryszkow
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.