Granted Patent
Utility
US 6,289,957 · App. 09/381,063
Control method and apparatus of a tree harvesting machine
Inventor:
Erkki Kare
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Sep 15, 1999
Inventor
Erkki Kare
Assignee (at issue)
Plustech Oy
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.