Granted Patent
Utility
US 6,428,693 · App. 09/866,006
Temporary silt guard for sewer inlet
Inventor:
Earl R. Singleton
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: May 24, 2001
Inventor
Earl R. Singleton
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.