Granted Patent
Utility
US 5,806,213 · App. 08/779,730
Rotatable support wheels for a snowplow
Inventors:
James R. Doornek, Gerald E. Lutzke
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Jan 6, 1997
Inventors
James R. Doornek
Gerald E. Lutzke
Assignee (at issue)
Douglas Dynamics, L.L.C.
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.