Granted Patent
Utility
US 4,411,459 · App. 06/278,642
Branch fitting for providing access to the interior of a pipe
Inventor:
Burton Ver Nooy
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Jun 29, 1981
Inventor
Burton Ver Nooy
Assignee (at issue)
T.D. WILLIAMSON
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.