Granted Patent
Utility
US 4,477,230 · App. 06/430,622
Continuous pressure and temperature readout for submersible pumps
Inventors:
Dick L. Knox, Steven D. Roberts
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 30, 1982
Inventors
Dick L. Knox
Steven D. Roberts
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.