Granted Patent
Utility
US 6,085,836 · App. 08/950,856
Well pump control using multiple sonic level detectors
Inventors:
Sanford A. Burris, David R. Hill, Karl F. Scheucher
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Oct 15, 1997
Inventors
Sanford A. Burris
David R. Hill
Karl F. Scheucher
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.