Granted Patent
Utility
US 5,593,331 · App. 08/497,806
Marine marker
Inventor:
John J. Duren
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Jul 3, 1995
Inventor
John J. Duren
Assignee (at issue)
Smith & Nephew Rolyan 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.