Granted Patent
Utility
US 4,764,021 · App. 06/468,164
Apparatus for ultrasonic agitation of liquids
Inventor:
William R. Eppes
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Feb 22, 1983
Inventor
William R. Eppes
Assignee (at issue)
Corning Glass Works
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.