Granted Patent
Utility
US 6,546,979 · App. 10/092,899
Method for controlling a drum debarker
Inventor:
Arvo Jonkka
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Mar 8, 2002
Inventor
Arvo Jonkka
Assignee (at issue)
Metso Paper Inc.
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.