Granted Patent
Utility
US 5,515,342 · App. 07/377,506
Dual frequency sonar transducer assembly
Inventors:
Cleo M. Stearns, David J. Erickson, Louis M. Izzo
Patented Case
View Patent ↗
Granted: May 7, 1996
Filed: Jul 10, 1989
Inventors
Cleo M. Stearns
David J. Erickson
Louis M. Izzo
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.