Granted Patent
Utility
US 6,599,340 · App. 10/188,412
Air flow passage for a cyclonic separator and vacuum cleaner having same
Inventors:
Wayne Ernest Conrad, Helmut Gerhard Conrad, Ted Szylowiec
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Jul 8, 2002
Inventors
Wayne Ernest Conrad
Helmut Gerhard Conrad
Ted Szylowiec
Assignee (at issue)
G.B.D. CORP.
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.