Granted Patent
Utility
US 5,720,243 · App. 08/771,798
Device for separation of dust
Inventors:
Erik Stegemyr, Staffan Björklund
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Dec 20, 1996
Inventors
Erik Stegemyr
Staffan Björklund
Assignee (at issue)
Aktiebolaget Electrolux
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.