Granted Patent
Utility
US 4,711,481 · App. 06/791,298
Vehicle impact attenuating device
Inventors:
William G. Krage, Barry D. Stephens, Owen S. Denman
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Oct 25, 1985
Inventors
William G. Krage
Barry D. Stephens
Owen S. Denman
Assignee (at issue)
ENERGY ABSORPTION SYSTEMS, 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.