Granted Patent
Utility
US 4,589,492 · App. 06/659,489
Subsea well submersible pump installation
Inventors:
Tom D. Greiner, Raymond L. Guzy, Dick L. Knox
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Oct 10, 1984
Inventors
Tom D. Greiner
Raymond L. Guzy
Dick L. Knox
Assignee (at issue)
Hughes Tool Company 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.