Granted Patent
Utility
US 5,149,144 · App. 07/324,953
Pipe branch fitting and branch appliance therefor
Inventor:
James Blakeley
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Mar 16, 1989
Inventor
James Blakeley
Assignee (at issue)
Sprink, 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.