Granted Patent
Utility
US 6,814,064 · App. 10/694,770
High efficiency engine with variable compression ratio and charge (VCRC engine)
Inventor:
Kenneth W. Cowans
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Oct 29, 2003
Inventor
Kenneth W. Cowans
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.