Granted Patent
Utility
US 5,485,977 · App. 08/312,536
Reduced harmonic switching mode apparatus and method for railroad vehicle signaling
Inventors:
James P. Brown, Robert P. Bozio
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Sep 26, 1994
Inventors
James P. Brown
Robert P. Bozio
Assignee (at issue)
Union Switch & Signal, Inc.
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.