Granted Patent
Utility
US 4,818,200 · App. 07/142,301
Hydrostatic steering device having the control valve within the rotor
Inventor:
Hollis N. White, Jr.
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Dec 28, 1987
Inventor
Hollis N. White, Jr.
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.