Granted Patent
Utility
US 4,863,147 · App. 07/206,115
Vehicle N2/oil suspension with external damping orifice adjustment
Inventors:
Frederick W. Loeber, Richard L. Hoffelmeyer, Jeffrey A. Jackson
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jun 13, 1988
Inventors
Frederick W. Loeber
Richard L. Hoffelmeyer
Jeffrey A. Jackson
Assignee (at issue)
Unit Rig, Inc.
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.