Granted Patent
Utility
US 6,708,654 · App. 09/995,674
High efficiency engine with variable compression ratio and charge (VCRC engine)
Inventor:
Kenneth W. Cowans
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Nov 29, 2001
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.