Granted Patent
Utility
US 6,308,117 · App. 09/528,121
Interlocking for a railway system
Inventors:
Henry Archer Ryland, Timothy John Molloy, Mark Tremlett
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Mar 17, 2000
Inventors
Henry Archer Ryland
Timothy John Molloy
Mark Tremlett
Assignee (at issue)
Westinghouse Brake and Signal Holdings Limited
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.