Granted Patent
Utility
US 5,515,568 · App. 08/317,176
Scrubbing machine having offset cylindrical brushes
Inventors:
Warren L. Larson, Michael L. Blehert, Robert A. Geyer, Michael S. Wilmo
Patented Case
View Patent ↗
Granted: May 14, 1996
Filed: Oct 3, 1994
Inventors
Warren L. Larson
Michael L. Blehert
Robert A. Geyer
Michael S. Wilmo
Assignee (at issue)
TENNANT COMPANY
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.