Granted Patent
Utility
US 5,566,134 · App. 05/252,930
Digital computer algorithm for processing sonar signals
Inventor:
Robert A. DuFault
Patented Case
View Patent ↗
Granted: Oct 15, 1996
Filed: May 4, 1972
Inventor
Robert A. DuFault
Assignee (at issue)
LOCKHEED MARTIN 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.