Granted Patent
Utility
US 4,419,047 · App. 06/388,519
Method of operation of a pump-turbine between part-load operation and reverse pumping operation
Inventors:
Dieter Klemm, Peter Ulith
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Jun 15, 1982
Inventors
Dieter Klemm
Peter Ulith
Assignee (at issue)
Voith GmbH
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.