Granted Patent
Utility
US 4,381,822 · App. 06/262,472
Landing nipple
Inventor:
Ernest P. Fisher, Jr.
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: May 11, 1981
Inventor
Ernest P. Fisher, Jr.
Assignee (at issue)
Otis Engineering Corporation
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.