Granted Patent
Utility
US 5,687,650 · App. 08/633,591
Gap closing device for closing gaps in auto rack car side walls
Inventors:
Richard F. Murphy, Michael K. Burke
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Apr 17, 1996
Inventors
Richard F. Murphy
Michael K. Burke
Assignee (at issue)
ZefTek, 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.