Granted Patent
Utility
US 6,736,873 · App. 10/322,451
Air flow passage for a vacuum cleaner
Inventors:
Wayne Ernest Conrad, Helmut Gerhard Conrad, Ted Szylowiec
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Dec 19, 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.