Granted Patent
Utility
US 6,508,162 · App. 09/852,955
Dual alloy piston and method of manufacture
Inventor:
Tommy J. Bedwell
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: May 10, 2001
Inventor
Tommy J. Bedwell
Assignee (at issue)
Federal-Mogul Worldwide, 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.