Granted Patent
Utility
US 5,772,361 · App. 08/615,344
Extendable anchor base septic tank
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Mar 11, 1996
Inventor
Norman W. Gavin
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.