Granted Patent
Utility
US 5,882,014 · App. 08/852,912
Removable section pipe seal for septic systems
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: May 8, 1997
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.