Granted Patent
Utility
US 5,206,839 · App. 07/796,075
Underwater sound source
Inventor:
Bruce Murray
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Nov 20, 1991
Inventor
Bruce Murray
Assignee (at issue)
Bolt, Beranek and Newman Inc.
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.