Granted Patent
Utility
US 4,295,370 · App. 06/169,819
Capacitive scheme for measuring the level of a liquid
Inventor:
Robert G. Bristol
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Jul 17, 1980
Inventor
Robert G. Bristol
Assignee (at issue)
Emhart Industries, Inc.
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.