Granted Patent
Utility
US 4,790,691 · App. 06/914,871
Fiber reinforced soil and method
Inventor:
W. Wayne Freed
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Oct 3, 1986
Inventor
W. Wayne Freed
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.