Granted Patent
Utility
US 4,304,419 · App. 06/050,381
Bounce and lope dampening for tractor scrapers
Inventor:
Warner G. Richardson
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Mar 12, 1979
Inventor
Warner G. Richardson
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.