Granted Patent
Utility
US 5,163,538 · App. 07/753,481
Low level damping valve and method for a semi-active hydraulic damper
Inventors:
Randall L. Derr, Stephen E. Dourson, Chris Keller, William S. Morgan
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Sep 3, 1991
Inventors
Randall L. Derr
Stephen E. Dourson
Chris Keller
William S. Morgan
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.