Granted Patent
Utility
US 5,572,921 · App. 08/394,665
Lift for the handicapped
Inventor:
Keith Krumbeck
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Feb 22, 1995
Inventor
Keith Krumbeck
Assignees (at issue)
Keith Krumbeck
Cindy Krumbeck
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.