Granted Patent
Utility
US 5,845,971 · App. 08/823,721
Side dump trailer
Inventor:
Ralph R. Rogers
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Mar 25, 1997
Inventor
Ralph R. Rogers
Assignee (at issue)
Circle R, 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.