Granted Patent
Utility
US 6,604,475 · App. 10/033,124
Drive mechanism for seed metering device
Inventors:
Bruce D. Peterson, Brent W. Nelson
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: Oct 22, 2001
Inventors
Bruce D. Peterson
Brent W. Nelson
Assignee (at issue)
Great Plains Manufacturing, 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.