Granted Patent
Utility
US 4,426,124 · App. 06/308,057
Feed through mandrel for submersible pump
Inventor:
Joseph E. Vandevier
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Oct 2, 1981
Inventor
Joseph E. Vandevier
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.