Granted Patent
Utility
US 4,580,686 · App. 06/653,500
Slackless self-adjusting rotary drawbar for railroad cars
Inventor:
William O. Elliott
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Sep 21, 1984
Inventor
William O. Elliott
Assignee (at issue)
McConway & Torley, LLC
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.