Granted Patent
Utility
US 6,705,332 · App. 10/328,516
Hard floor surface cleaner utilizing an aerated cleaning liquid
Inventors:
Bruce F. Field, Bryan Christensen, Michael L. Blehert
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Dec 23, 2002
Inventors
Bruce F. Field
Bryan Christensen
Michael L. Blehert
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.