Granted Patent
Utility
US 6,586,711 · App. 09/915,479
Current control method for an oxygen sensor heater
Inventors:
Christopher E. Whitney, Yonas Nebiyeloul-Kifle, Jeffry A. Helmick, Bradley E. De Pottey
Patented Case
View Patent ↗
Granted: Jul 1, 2003
Filed: Jul 27, 2001
Inventors
Christopher E. Whitney
Yonas Nebiyeloul-Kifle
Jeffry A. Helmick
Bradley E. De Pottey
Assignee (at issue)
General Motors LLC
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.