Granted Patent
Utility
US 6,732,667 · App. 08/818,717
Grain drill with weight sensing device for sensing the weight of seed grain in a hopper
Inventor:
David Edward Wilson
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Mar 14, 1997
Inventor
David Edward Wilson
Assignee (at issue)
Ken Von Muenster
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.