Granted Patent
Utility
US 4,497,205 · App. 06/450,648
Method and apparatus for automatically sensing the level of a liquid in a reservoir
Inventors:
Gary B. Zulauf, Ben J. Charboneau
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Dec 17, 1982
Inventors
Gary B. Zulauf
Ben J. Charboneau
Assignee (at issue)
Gulf Eastern Manufacturing Company
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.