Granted Patent
Utility
US 5,540,465 · App. 08/283,828
Pipe, valve and/or tee coupler
Inventor:
David E. Sisk
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Aug 1, 1994
Inventor
David E. Sisk
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.