Granted Patent
Utility
US 5,130,016 · App. 07/646,114
Drain grate
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: Jan 28, 1991
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.