Granted Patent
Utility
US 4,379,330 · App. 06/224,912
Railroad car wheel detector
Inventor:
W. Woodward Sanville
Patented Case
View Patent ↗
Granted: Apr 5, 1983
Filed: Jan 14, 1981
Inventor
W. Woodward Sanville
Assignee (at issue)
Servo Corporation of America
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.