Granted Patent
Utility
US 5,927,898 · App. 09/048,387
Method for installing a septic tank in soil
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Mar 26, 1998
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.