Granted Patent
Utility
US 4,833,659 · App. 06/686,804
Sonar apparatus
Inventors:
Frederick G. Geil, Henry M. Gruen, Howard S. Newman, Thomas J. Ratz, Linwood M. Rowe, Jr., John H. Thompson
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Dec 27, 1984
Inventors
Frederick G. Geil
Henry M. Gruen
Howard S. Newman
Thomas J. Ratz
Linwood M. Rowe, Jr.
John H. Thompson
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.