Granted Patent
Utility
US 4,360,221 · App. 06/273,887
Torsion bar axle suspension
Inventor:
Ernest W. Wagner
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Oct 27, 1980
Inventor
Ernest W. Wagner
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.