Granted Patent
Utility
US 4,635,240 · App. 06/716,304
Sonar navigation system
Inventors:
Kenneth P. Geohegan, Jr., Charles Wayne Allen
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Mar 26, 1985
Inventors
Kenneth P. Geohegan, Jr.
Charles Wayne Allen
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.