Granted Patent
Utility
US 4,586,332 · App. 06/672,723
Hydraulic swing motor control circuit
Inventor:
Lawrence F. Schexnayder
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Nov 19, 1984
Inventor
Lawrence F. Schexnayder
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.