Granted Patent
Utility
US 6,715,457 · App. 10/393,481
Piston assembly
Inventors:
Christopher T. Shoptaw, Ralph Edwin Fain
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Mar 20, 2003
Inventors
Christopher T. Shoptaw
Ralph Edwin Fain
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.