Granted Patent
Utility
US 4,439,845 · App. 06/327,151
Sonar system
Inventors:
Kenneth P. Geohegan, Jr., Henry M. Gruen
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Dec 3, 1981
Inventors
Kenneth P. Geohegan, Jr.
Henry M. Gruen
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.