Granted Patent
Utility
US 5,203,513 · App. 07/657,992
Wear-resistant surface armoring for the rollers of roller machines, particularly high-pressure roller presses
Inventors:
Guenter Keller, Jakob Ansen, Albrecht Wolter
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Feb 20, 1991
Inventors
Guenter Keller
Jakob Ansen
Albrecht Wolter
Assignee (at issue)
Kloeckner-Humboldt-Deutz AG
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.