Granted Patent
Utility
US 4,431,060 · App. 06/278,491
Earth working machine and blade condition control system therefor
Inventors:
Rolland D. Scholl, Gene B. Easterling
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Apr 15, 1981
Inventors
Rolland D. Scholl
Gene B. Easterling
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.