Granted Patent
Utility
US 4,966,708 · App. 07/443,736
Power recovery pump turbine
Inventors:
Robert A. Oklejas, Eli Oklejas, Jr.
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Nov 30, 1989
Inventors
Robert A. Oklejas
Eli Oklejas, Jr.
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.