Granted Patent
Utility
US 4,856,804 · App. 07/179,849
Self unloading multiple trailer arrangement
Inventor:
Boyd B. Nash
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Apr 11, 1988
Inventor
Boyd B. Nash
Assignee (at issue)
Independent Trailer & Repair, 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.