Granted Patent
Utility
US 5,456,504 · App. 08/237,654
Locking and unlocking apparatus for access door on a passenger railway vehicle
Inventor:
Daniel Brillant
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: May 4, 1994
Inventor
Daniel Brillant
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.