Granted Patent
Utility
US 6,202,243 · App. 09/320,150
Surface cleaning machine with multiple control positions
Inventors:
Jeffrey J. Beaufoy, Kevin L. Shinler
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: May 26, 1999
Inventors
Jeffrey J. Beaufoy
Kevin L. Shinler
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.