Granted Patent
Utility
US 6,684,844 · App. 10/238,654
Piston and cylinder bore having improved scuffing resistance
Inventors:
Yucong Wang, Donald L. Brown
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Sep 10, 2002
Inventors
Yucong Wang
Donald L. Brown
Assignee (at issue)
General Motors LLC
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.