Granted Patent
Utility
US 5,429,451 · App. 08/056,309
Grid matrix system including interconnected revetment blocks
Inventor:
Gary K Pettee, Jr.
Patented Case
View Patent ↗
Granted: Jul 4, 1995
Filed: Apr 30, 1993
Inventor
Gary K Pettee, Jr.
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.