Granted Patent
Utility
US 5,446,664 · App. 08/391,628
Method and apparatus for diagnosing faulty cylinders in internal combustion engines
Inventors:
David Vossen, James T. Walters
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Feb 21, 1995
Inventors
David Vossen
James T. Walters
Assignee (at issue)
SPX Corporation
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.