Granted Patent
Utility
US 4,458,621 · App. 06/269,036
Fishing vessels
Inventor:
Graham R. De Clifford
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: May 14, 1981
Inventor
Graham R. De Clifford
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.