Granted Patent
Utility
US 6,089,077 · App. 08/883,346
Mass fraction burned and pressure estimation through spark plug ion sensing
Inventor:
Chao F. Daniels
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jun 26, 1997
Inventor
Chao F. Daniels
Assignee (at issue)
Cooper Automotive Products, Inc.
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.