Granted Patent
Utility
US 5,577,776 · App. 08/434,180
Tee fitting for lined pipe
Inventor:
Joseph L. Welch
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: May 3, 1995
Inventor
Joseph L. Welch
Assignee (at issue)
TDW Delaware, Inc.
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.