Granted Patent
Utility
US 4,133,218 · App. 05/827,906
Control apparatus
Inventor:
Carl Carter
Patented Case
View Patent ↗
Granted: Jan 9, 1979
Filed: Aug 26, 1977
Inventor
Carl Carter
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.