Granted Patent
Utility
US 4,972,145 · App. 07/450,484
Speed sensor gap fault-detection arrangement for multiple-axle rail vehicles
Inventors:
James A. Wood, John W. Drake
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Dec 14, 1989
Inventors
James A. Wood
John W. Drake
Assignee (at issue)
American Standard 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.