Granted Patent
Utility
US 5,134,852 · App. 07/571,181
Clam shell type Y-joint
Inventor:
Andrew Weeks
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Aug 23, 1990
Inventor
Andrew Weeks
Assignee (at issue)
Tennessee Gas Pipeline Company
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.