Granted Patent
Utility
US 4,295,530 · App. 06/133,190
Lower link draft sensing system on tractor
Inventors:
Herbert Edward Ashfield, Harry Horsfall, Philip M. Wade
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Mar 24, 1980
Inventors
Herbert Edward Ashfield
Harry Horsfall
Philip M. Wade
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.