Granted Patent
Utility
US 6,224,471 · App. 08/953,811
Dust Collector
Inventors:
Earl R. Clowers, John Schnell
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Oct 20, 1997
Inventors
Earl R. Clowers
John Schnell
Assignee (at issue)
Porter-Cable 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.