Granted Patent
Utility
US 4,760,879 · App. 07/126,137
Choke and kill control system
Inventor:
Ronald E. Pringle
Patented Case
View Patent ↗
Granted: Aug 2, 1988
Filed: Nov 27, 1987
Inventor
Ronald E. Pringle
Assignee (at issue)
Camco Inc.
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.