Granted Patent
Utility
US 5,871,567 · App. 08/766,475
Dual Media air filter with electrostatic charge
Inventors:
Edward Allen Covington, Demetrios A. Tsengouras
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Dec 12, 1996
Inventors
Edward Allen Covington
Demetrios A. Tsengouras
Assignee (at issue)
DANA LIMITED
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.