Granted Patent
Utility
US 4,398,617 · App. 06/334,024
Rear axle-drawbar oscillation support system
Inventors:
Elmer R. Crabb, Nick D. Hoyle
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Nov 18, 1981
Inventors
Elmer R. Crabb
Nick D. Hoyle
Assignee (at issue)
Caterpillar Tractor Co.
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.