Granted Patent
Utility
US 4,635,981 · App. 06/665,721
Impact attenuating body
Inventor:
Warren D. Friton
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Oct 29, 1984
Inventor
Warren D. Friton
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.