Granted Patent
Utility
US 6,176,320 · App. 09/239,207
Method and apparatus for precision planting, weeding, and cultivation of crops/ a metric walking tractor
Inventor:
Gilbert T. Lopez
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Jan 28, 1999
Inventor
Gilbert T. Lopez
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.