Granted Patent
Utility
US 5,720,074 · App. 08/580,443
Vacuum cleaner having a noise reduction system
Inventor:
Jae-Duck Lee
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Dec 27, 1995
Inventor
Jae-Duck 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.