Granted Patent
Utility
US 4,856,594 · App. 07/237,585
Wellhead connector locking device
Inventor:
Charles E. Jennings
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Aug 26, 1988
Inventor
Charles E. Jennings
Assignee (at issue)
Vetco Gray, LLC
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.