Granted Patent
Utility
US 6,694,790 · App. 10/124,079
Mid plate process and equipment for the superplastic forming of parts from plural sheets
Inventors:
Edward Frank Ryntz, Richard M. Kleber
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Apr 17, 2002
Inventors
Edward Frank Ryntz
Richard M. Kleber
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.