Granted Patent
Utility
US 6,477,941 · App. 09/684,127
Dual gallery piston
Inventors:
Xilou Zhu, Alan S. Brown, Walter Joseph Griffiths, Miguel Azevedo
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Oct 6, 2000
Inventors
Xilou Zhu
Alan S. Brown
Walter Joseph Griffiths
Miguel Azevedo
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.