Granted Patent
Utility
US 6,364,633 · App. 09/537,058
Internally ported hydraulically actuated down-hole pump
Inventor:
Melvin E. Kelly
Patented Case
View Patent ↗
Granted: Apr 2, 2002
Filed: Mar 28, 2000
Inventor
Melvin E. Kelly
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.