Granted Patent
Utility
US 5,390,735 · App. 07/986,308
Full bore lock system
Inventor:
Jimmie R. Williamson, Jr.
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Dec 7, 1992
Inventor
Jimmie R. Williamson, Jr.
Assignee (at issue)
Halliburton
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.