Granted Patent
Utility
US 6,025,702 · App. 08/641,439
Signal processing unit for a trolley pole switch controller
Inventors:
Francis A. Launier, John H. Corvin, Charles C. Siegling, III
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: May 1, 1996
Inventors
Francis A. Launier
John H. Corvin
Charles C. Siegling, III
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.