Granted Patent
Utility
US 6,454,310 · App. 09/994,139
Beveled insert for coupling pipes
Inventor:
Steven K. Wolff
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Nov 26, 2001
Inventor
Steven K. Wolff
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.