Granted Patent
Utility
US 5,319,972 · App. 07/963,892
Ultrasonic liquid level measurement system
Inventors:
Tod A. Oblak, Daniel F. Dudek, John R. Smith
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Oct 19, 1992
Inventors
Tod A. Oblak
Daniel F. Dudek
John R. Smith
Assignee (at issue)
Westinghouse Electric 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.