Granted Patent
Utility
US 5,127,337 · App. 07/723,719
Reaction rail
Inventors:
William C. Beattie, W. John Ballantyne
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Jun 19, 1991
Inventors
William C. Beattie
W. John Ballantyne
Assignee (at issue)
Urban Transportation Development Corp., Ltd.
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.