Granted Patent
Utility
US 4,955,467 · App. 07/289,362
Energy damping device
Inventor:
Ralph M. Kallenbach
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Dec 21, 1988
Inventor
Ralph M. Kallenbach
Assignee (at issue)
Fluor Corporation
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.