Granted Patent
Utility
US 5,747,764 · App. 08/792,161
Electric power switch for a vacuum cleaner which has a suction control function
Inventors:
Chang Woo Son, Yang-Rae Kim
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Jan 30, 1997
Inventors
Chang Woo Son
Yang-Rae 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.