Granted Patent
Utility
US 4,664,202 · App. 06/648,761
Folding implement frame for grain drills and the like
Inventors:
Roy E. Applequist, Eric Johnson, Ray A. Adee
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Sep 7, 1984
Inventors
Roy E. Applequist
Eric Johnson
Ray A. Adee
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.