Granted Patent
Utility
US 4,447,072 · App. 06/330,545
Suspension for pivotally mounting a rigid axle assembly
Inventors:
Kirk Bradley, Robert R. Koski, James W. Clark
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Dec 14, 1981
Inventors
Kirk Bradley
Robert R. Koski
James W. Clark
Assignee (at issue)
Envirotech, 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.