Granted Patent
Utility
US 4,707,128 · App. 06/687,989
Turbid media viewing system
Inventor:
Bryan W. Coles
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Dec 31, 1984
Inventor
Bryan W. Coles
Assignee (at issue)
Subsea Engineering Associates, 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.