Granted Patent
Utility
US 6,298,291 · App. 09/470,632
Method of establishing baseline filter for air quality
Inventors:
Leighton Ira Davis, Jr., John David Hoeschele, Gerhard A. Dage
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Dec 22, 1999
Inventors
Leighton Ira Davis, Jr.
John David Hoeschele
Gerhard A. Dage
Assignee (at issue)
Visteon Global Technologies, Inc.
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.