Granted Patent
Utility
US 6,209,657 · App. 09/348,995
Forward folding tillage implement
Inventor:
Terrence Friggstad
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Mar 12, 1998
Inventor
Terrence Friggstad
Assignee (at issue)
Flexi-Coil Ltd.
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.