Granted Patent
Utility
US 5,970,577 · App. 08/997,333
Brush head assembly for a vacuum cleaner
Inventor:
Suk-Gu Kim
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Dec 23, 1997
Inventor
Suk-Gu Kim
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.