Granted Patent
Utility
US 4,605,070 · App. 06/718,628
Redundant safety valve system and method
Inventor:
Arthur J. Morris
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Apr 1, 1985
Inventor
Arthur J. Morris
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.