Granted Patent
Utility
US 6,374,184 · App. 09/585,184
Methods and apparatus for determining that a train has changed paths
Inventors:
Charles Zahm, William L. Matheson
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Jun 1, 2000
Inventors
Charles Zahm
William L. Matheson
Assignee (at issue)
GE Harris Railway Electronics LLC
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.