Granted Patent
Utility
US 5,000,371 · App. 07/494,886
Method of producing a metallic interface
Inventor:
James W. Johnson
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Mar 9, 1990
Inventor
James W. Johnson
Assignee (at issue)
Cooper Industries Holdings
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.