Granted Patent
Utility
US 5,971,497 · App. 08/984,147
Vacuum cleaner having an apparatus for fixing wheels
Inventor:
Nam-Ho Lee
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Dec 3, 1997
Inventor
Nam-Ho Lee
Assignee (at issue)
Daewoo Electronics Corporation
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.