Granted Patent
Utility
US 4,873,676 · App. 07/078,871
Sonar depth sounder apparatus
Inventors:
James B. Bailey, Robert R. Gibson, Alvin Nunley, III, Q. Wayne Utz
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Jul 28, 1987
Inventors
James B. Bailey
Robert R. Gibson
Alvin Nunley, III
Q. Wayne Utz
Assignee (at issue)
Techsonic Industries, 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.