Granted Patent
Utility
US 4,489,648 · App. 06/571,772
Baler density control mechanism
Inventor:
Adrianus Naaktgeboren
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jan 18, 1984
Inventor
Adrianus Naaktgeboren
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.