Granted Patent
Utility
US 4,230,199 · App. 05/973,043
Apparatus for shifting center of gravity of a work vehicle
Inventor:
Robert N. Stedman
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Dec 12, 1978
Inventor
Robert N. Stedman
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.