Granted Patent
Utility
US 5,815,466 · App. 08/811,103
Hydrophone structure with reverse bend of piezoelectric element
Inventor:
Louis W. Erath
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Mar 3, 1997
Inventor
Louis W. Erath
Assignee (at issue)
Syntron, 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.