Granted Patent
Utility
US 5,844,127 · App. 08/759,311
Apparatus for isolating or testing a pipe segment
Inventors:
Guy Berube, Glenn Carson
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Dec 2, 1996
Inventors
Guy Berube
Glenn Carson
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.