Granted Patent
Utility
US 5,282,412 · App. 07/910,857
Piston ring subassembly, angulating piston assembly and method of making same
Inventor:
David M. Ebbing
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Jun 30, 1992
Inventor
David M. Ebbing
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.