Granted Patent
Utility
US 5,675,556 · App. 08/545,111
Hydrophone structure and method
Inventors:
Louis W. Erath, Gary Craig
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Oct 19, 1995
Inventors
Louis W. Erath
Gary Craig
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.