Granted Patent
Utility
US 5,138,163 · App. 07/756,701
Direct sampling of engine emissions for instantaneous analysis
Inventors:
James W. Butler, Alex D. Colvin, Thomas Korniski
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Sep 9, 1991
Inventors
James W. Butler
Alex D. Colvin
Thomas Korniski
Assignee (at issue)
Ford Motor Company
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.