Granted Patent
Utility
US 4,440,232 · App. 06/401,808
Well pressure compensation for blowout preventers
Inventor:
Joseph L. LeMoine
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Jul 26, 1982
Inventor
Joseph L. LeMoine
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.