Granted Patent
Utility
US 4,733,242 · App. 03/829,181
Submarine detection system
Inventor:
Louis DeRosa
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Jul 20, 1959
Inventor
Louis DeRosa
Assignee (at issue)
ITT Corporation
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.