Granted Patent
Utility
US 4,293,040 · App. 06/064,097
Hydraulic draft load sensing system including quill shaft bendable in response to draft loads
Inventor:
John O'Connor
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Aug 6, 1979
Inventor
John O'Connor
Assignee (at issue)
Allis-Chalmers Corporation
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.