Granted Patent
Utility
US 4,059,159 · App. 05/615,298
Agricultural tractor with draft load sensing springs for power lift control
Inventors:
Stephen Moorhouse, Harry Horsfall, Alan Rangeley Dean
Patented Case
View Patent ↗
Granted: Nov 22, 1977
Filed: Sep 22, 1975
Inventors
Stephen Moorhouse
Harry Horsfall
Alan Rangeley Dean
Assignee (at issue)
David Brown Tractors Ltd.
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.