Granted Patent
Utility
US 4,221,267 · App. 06/012,163
Angle and tilt implement assembly
Inventors:
Jerrold R. Asal, James A. Olthoff
Patented Case
View Patent ↗
Granted: Sep 9, 1980
Filed: Jan 29, 1979
Inventors
Jerrold R. Asal
James A. Olthoff
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.