Granted Patent
Utility
US 6,442,789 · App. 10/034,475
Riding floor scrubber
Inventors:
Donald Joseph Legatt, Paul Mueller, Wolfgang Lehmann
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Dec 28, 2001
Inventors
Donald Joseph Legatt
Paul Mueller
Wolfgang Lehmann
Assignee (at issue)
Nilfisk-Advance, 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.