Granted Patent
Utility
US 5,906,182 · App. 09/027,697
Engine piston
Inventors:
James Leonard Blase, Richard Wayne Tupek, Chih L. Liu
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Feb 23, 1998
Inventors
James Leonard Blase
Richard Wayne Tupek
Chih L. Liu
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.