Granted Patent
Utility
US 5,746,293 · App. 08/691,526
Pneumatic pressure to hydraulic pressure intensifier mechanism
Inventor:
Thomas H. Engle
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Aug 2, 1996
Inventor
Thomas H. Engle
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.