Granted Patent
Utility
US 5,673,236 · App. 08/681,706
Underwater acoustic projector
Inventor:
James E. Barger
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Jul 2, 1996
Inventor
James E. Barger
Assignee (at issue)
BBN 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.