Granted Patent
Utility
US 4,558,608 · App. 06/452,003
Cutterhead reversing drive for forage harvesters
Inventor:
Curtis H. Lindblom
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Dec 21, 1982
Inventor
Curtis H. Lindblom
Assignee (at issue)
Sperry Corp.
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.