Granted Patent
Utility
US 6,418,587 · App. 09/565,221
Cleaning tool
Inventors:
Roger Kent, Rodney D. Maddox, Frank Stephan, William B. Kennedy
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: May 5, 2000
Inventors
Roger Kent
Rodney D. Maddox
Frank Stephan
William B. Kennedy
Assignee (at issue)
Rug Doctor, L.P.
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.