Granted Patent
Utility
US 4,337,653 · App. 06/258,510
Blowout preventer control and recorder system
Inventor:
John A. Chauffe
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Apr 29, 1981
Inventor
John A. Chauffe
Assignee (at issue)
Koomey, 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.