Granted Patent
Utility
US 6,662,402 · App. 10/081,374
Apparatus for cleaning fabrics, floor coverings, and bare floor surfaces utilizing a soil transfer cleaning medium
Inventors:
Daniel G. Giddings, Richard W. Wellens, Larry Wydra
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Feb 22, 2002
Inventors
Daniel G. Giddings
Richard W. Wellens
Larry Wydra
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.