Granted Patent
Utility
US 5,797,591 · App. 08/846,123
Guardrail with improved ground anchor assembly
Inventor:
William G. Krage
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Apr 25, 1997
Inventor
William G. Krage
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.