Granted Patent
Utility
US 5,787,849 · App. 08/751,688
Valve timing phase changer
Inventor:
Stephen W. Mitchell
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Nov 18, 1996
Inventor
Stephen W. Mitchell
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.