Granted Patent
Utility
US 5,422,321 · App. 08/113,566
Composition and process for making an engine valve
Inventors:
Thomas Whalen, Walter Trela, Samuel S. Shinozaki, John R. Baer
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Aug 27, 1993
Inventors
Thomas Whalen
Walter Trela
Samuel S. Shinozaki
John R. Baer
Assignee (at issue)
Ford Motor Company
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.