Granted Patent
Utility
US 4,737,274 · App. 06/882,716
Tramp material separator
Inventors:
Finn Jacobsen, Rolf Ekholm
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Jul 7, 1986
Inventors
Finn Jacobsen
Rolf Ekholm
Assignee (at issue)
Kamyr AB
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.