Granted Patent
Utility
US 4,640,365 · App. 06/726,802
Row following guidance device for a tractor-drawn row crop implement
Inventor:
Eugene H. Schmidt
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Apr 24, 1985
Inventor
Eugene H. Schmidt
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.