Granted Patent
Utility
US 5,255,512 · App. 07/970,910
Air fuel ratio feedback control
Inventors:
Douglas R. Hamburg, Thomas Raymond Culbertson, Judith M. Curran
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Nov 3, 1992
Inventors
Douglas R. Hamburg
Thomas Raymond Culbertson
Judith M. Curran
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.