Granted Patent
Utility
US 6,290,761 · App. 09/732,149
Filter for vacuum cleaner
Inventors:
Dean R. Rohn, John J. Alberts, III, Alan J. Krebs, Roy O. Erickson, Jr.
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Dec 7, 2000
Inventors
Dean R. Rohn
John J. Alberts, III
Alan J. Krebs
Roy O. Erickson, Jr.
Assignee (at issue)
REXAIR LLC
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.