Granted Patent
Utility
US 4,747,606 · App. 07/032,939
Bi-directional metal-to-metal seal
Inventor:
Charles E. Jennings
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Mar 27, 1987
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.