Granted Patent
Utility
US 4,586,331 · App. 06/710,342
Automatic hydraulic speed control
Inventor:
Donald M. Ohman
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Apr 24, 1985
Inventor
Donald M. Ohman
Assignee (at issue)
Caterpillar Industrial Inc.
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.