Granted Patent
Utility
US 6,257,670 · App. 09/540,354
Side dump trailer
Inventor:
Ralph R. Rogers
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Mar 31, 2000
Inventor
Ralph R. Rogers
Assignee (at issue)
Thurston Manufacturing Company
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.