Granted Patent
Utility
US 6,800,140 · App. 10/044,890
Extraction cleaning with optimal cleaning speed
Inventor:
Samuel Hansen
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Jan 11, 2002
Inventor
Samuel Hansen
Assignee (at issue)
BISSELL Homecare, Inc.
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.