Granted Patent
Utility
US 6,507,968 · App. 09/656,774
Side skirt for a surface treating apparatus
Inventor:
Karl Hansen
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Sep 7, 2000
Inventor
Karl Hansen
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.