Granted Patent
Utility
US 5,660,237 · App. 08/361,766
Castering wheel assemblies for an auto-fold agricultural drawbar
Inventors:
Stanley Joseph Boyko, Garry Kupchinski, Darryl Kerr
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Dec 22, 1994
Inventors
Stanley Joseph Boyko
Garry Kupchinski
Darryl Kerr
Assignee (at issue)
F. P. Bourgault Industries Air Seeder Division 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.