Granted Patent
Utility
US 5,655,493 · App. 08/587,422
Exhaust valve for internal combustion engine
Inventors:
Bernard F. Enright, David Lange
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Jan 16, 1996
Inventors
Bernard F. Enright
David Lange
Assignee (at issue)
Dresser Industries, 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.