Granted Patent
Utility
US 5,653,408 · App. 08/635,876
Direct support frog assembly
Inventors:
Stephen R. Kuhn, Ronald Lee Lancaster, Ted A. Rittenhouse, Kenneth L. Schultz, Keith Young
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Apr 18, 1996
Inventors
Stephen R. Kuhn
Ronald Lee Lancaster
Ted A. Rittenhouse
Kenneth L. Schultz
Keith Young
Assignee (at issue)
ABC Rail Products Corporation
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.