Granted Patent
Utility
US 5,390,490 · App. 08/145,549
Method and apparatus for measuring the efficacy of a catalytic converter
Inventor:
Timothy J. Brooks
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Nov 4, 1993
Inventor
Timothy J. Brooks
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.