Granted Patent
Utility
US 6,189,178 · App. 09/520,270
Handheld extraction cleaner
Inventor:
Kenneth L. Roberts
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Mar 7, 2000
Inventor
Kenneth L. Roberts
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.