Granted Patent
Utility
US 5,271,144 · App. 07/912,622
Coil coating of sheet metal to provide localized corrosion protection
Inventor:
John R. Barker
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: Jun 29, 1992
Inventor
John R. Barker
Assignee (at issue)
ES Products
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.