Granted Patent
Utility
US 5,100,243 · App. 07/626,204
Self-calibrating hot wheel detector for railroads
Inventors:
George Grosskopf, W. Woodward Sanville
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Dec 12, 1990
Inventors
George Grosskopf
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.