Granted Patent
Utility
US 5,579,696 · App. 08/526,205
Rail car side frame car progressor contact
Inventor:
Thomas R. Berg
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Sep 11, 1995
Inventor
Thomas R. Berg
Assignee (at issue)
Standard Research and Design 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.